Pregnancy Article

PREGNANCY SYMPTOMS:

noreply@blogger.com (Anonymous) — Tue, 01 Feb 2011 13:38:00 +0000

Top ten signs you might be pregnant

Could you be pregnant? Most likely you won't notice any symptoms until about the time you've missed a period - or a week or two later.

If you're not keeping track of your menstrual cycle or if it varies widely from one month to the next, you may not be sure when to expect your period. But if you start to experience some of the symptoms below - not all women get them all - and you haven't had a period for a while, you may very well be pregnant. Take a home pregnancy test to find out for sure!

If you are pregnant, visit our Newly Pregnant area for a quick overview of what's in store.

01. Tender, swollen breasts

One of the early signs of pregnancy is sensitive, sore breasts caused by increasing levels of hormones. The soreness may feel like an exaggerated version of how your breasts feel before your period. Your discomfort should diminish significantly after the first trimester, as your body adjusts to the hormonal changes.

02. Fatigue

Feeling tired all of a sudden? No, make that exhausted. No one knows for sure what causes early pregnancy fatigue, but it's possible that rapidly increasing levels of the hormone progesterone are contributing to your sleepiness.You should start to feel more energetic once you hit your second trimester, although fatigue usually returns late in pregnancy when you're carrying around a lot more weight and some of the common discomforts of pregnancy make it more difficult to get a good night's sleep.

03. Implantation bleeding

Some women have a small amount of vaginal bleeding around 11 or 12 days after conception (close to the time you might notice a missed period). The bleeding may be caused by the fertilized egg burrowing into the blood-rich lining of your uterus — a process that starts just six days after fertilization — but no one knows for sure.

The bleeding is very light (appearing as red spotting or pink or reddish-brown staining) and lasts only a day or two. (Let your practitioner know if you notice any bleeding or spotting, particularly if it's accompanied by pain, since this can be a sign of an ectopic pregnancy.)

04. Nausea or vomiting

If you're like most women, morning sickness won't hit until about a month after conception. (A lucky few escape it altogether.) But some women do start to feel queasy a bit earlier. And not just in the morning, either — pregnancy-related nausea and vomiting can be a problem morning, noon, or night.

About half of women with nausea feel complete relief by the beginning of the second trimester. For most others it takes another month or so for the queasiness to ease up.

05. Increased sensitivity to odors

If you're newly pregnant, it's not uncommon to feel repelled by the smell of a bologna sandwich or cup of coffee and for certain aromas to trigger your gag reflex. Though no one knows for sure, this may be a side effect of rapidly increasing amounts of estrogen in your system. You may also find that certain foods you used to enjoy are suddenly completely repulsive to you.

06. Abdominal bloating

Hormonal changes in early pregnancy may leave you feeling bloated, similar to the feeling some women have just before their period arrives. That's why your clothes may feel snugger than usual at the waistline, even early on when your uterus is still quite small.

07. Frequent urination

Shortly after you become pregnant, you may find yourself hurrying to the bathroom all the time. Why? Mostly because during pregnancy the amount of blood and other fluids in your body increases, which leads to extra fluid being processed by your kidneys and ending up in your bladder.

This symptom may start as early as six weeks into your first trimester and continue or worsen as your pregnancy progresses and your growing baby exerts more pressure on your bladder.

08. A missed period

If you're usually pretty regular and your period doesn't arrive on time, you'll probably take a pregnancy test long before you notice any of the above symptoms. But if you're not regular or you're not keeping track of your cycle, nausea and breast tenderness and extra trips to the bathroom may signal pregnancy before you realize you didn't get your period.

09. Your basal body temperature stays high

If you've been charting your basal body temperature and you see that your temperature has stayed elevated for 18 days in a row, you're probably pregnant.And finally...

The proof: A positive home pregnancy test

In spite of what you might read on the box, many home pregnancy tests are not sensitive enough to detect most pregnancies until about a week after a missed period. So if you decide to take one earlier than that and get a negative result, try again in a few days.

Once you've gotten a positive result, make an appointment with your practitioner. Now head over to our pregnancy area. Also, don't forget to update your profile and sign up for our "My Baby This Week" newsletter. Congratulations!

Pregnancy: body changes

noreply@blogger.com (Anonymous) — Fri, 17 Jul 2009 12:59:00 +0000

This article touches on some of the common bodily changes that women experience during pregnancy. Don't, however, hesitate to ask your doctor for more information, because every pregnancy is unique.

Appetite: Pregnancy is a time when womens' appetites increase. This begins in the first trimester, gathers steam throughout the pregnancy, and continues into the time you breastfeed, because you have to eat for both you and your baby.

Nausea/vomiting: Nausea and vomiting affects the majority (70%) of pregnant women early in pregnancy. It's important to know that these symptoms are not necessarily consistent between pregnancies, or within families, so each pregnancy may be different in terms of these symptoms.

Nausea and vomiting usually begins in the first two months of pregnancy and often ends by the fourth month. These symptoms are often worse in the morning, but can occur at any time of the day. Occasionally eating smaller meals is helpful. Your physician may also be able to suggest safe medications to help you feel better if you are suffering from these symptoms.

Swollen gums: Your gums may become swollen and soft, and may bleed more easily with brushing. If the gums bleed excessively, show them to your physician.

GERD/heartburn: The valve between your esophagus and stomach loosens, which increases the chance that you will experience gastroesophageal reflux, or heartburn.

Constipation and hemorrhoids: Many women experience constipation. Hemorrhoids may flare up as a result of the increased pressure of the growing uterus.

Gallstones: During pregnancy, gallstone formation is more frequent. Symptoms of this may include pain in the right upper part of your abdomen.

Diabetes: The hormonal changes during pregnancy lead to more insulin resistance, which in turn raises the risk of diabetes, which is why your doctor often tests your blood sugar later in pregnancy to make sure that you have not actually developed diabetes. If you do happen to develop diabetes, it's very important, both for yourself and your baby, that you continue to see your doctor and that you do everything you can to achieve optimal control of your blood glucose level.

Stretch marks: Up to half of pregnant women get stretch marks. These can occur on the breasts, lower abdomen, and upper thighs. They begin as pink or purple marks but fade to gray or white after delivery. Many creams have been tried to combat these marks, though none has been proven very effective.

Pigmentation/darkening of the skin: In many women, the increased levels of hormones in pregnancy cause darkening of the skin. This is seen most markedly in the areas of the nipples, umbilicus (belly button), armpits, and perineum (genital area), as well as the lower abdomen.

In addition, some women develop what is called the "mask of pregnancy." This is a darkening of the skin of the forehead, cheeks, nose, and upper lip in a blotchy pattern, which may sometimes remain after the pregnancy ends.

Finally, many women find that their pre-existing moles and birthmarks enlarge and darken during pregnancy, though they tend to return to their previous state after delivery.

Hair: Hair grows and falls out in a cycle. During pregnancy, all of a woman's hairs tend to enter the same stage in their growth cycle. As a result, in the months following pregnancy, many hairs fall out at the same time, which is why many women find that their hair becomes thinner at that time. Fortunately, this is only temporary; within several months the hairs enter different stages of their life cycle, ensuring the return of a full head of hair.

The respiratory system: Pregnant women often feel as though they have a cold throughout pregnancy because the tissues of the nasal passages become fuller and secrete more mucus during this time. There is also a higher incidence of nosebleeds.

Also, a pregnant woman takes in more oxygen per breath, which allows her to provide oxygen to her baby without breathing more quickly than usual.

The breasts: Early in pregnancy, many women find that their breasts feel heavy, and may be tender. This may be one of the first clues that you are pregnant. Breasts enlarge throughout pregnancy, stimulated by estrogen in preparation for breastfeeding. The two breasts do not always grow the same amount. The nipples also enlarge and become more mobile in preparation for infant suckling. Toward the end of pregnancy a thick yellow fluid called colostrum leaks from the breast. This precedes milk production.

Urinary tract: Pregnant women urinate much more frequently than usual, as a result of both anatomic changes and the increased blood volume that a woman has during pregnancy.

But sometimes these symptoms may be due to urinary and kidney infections, which are more common during pregnancy. Symptoms of urinary and kidney infections include burning on urination, an urgent need to urinate more often, especially at night, bleeding in the urine, and pain in the flanks or abdomen.

Such infections may also be "silent" and lead to no noticeable symptoms, and thus, your doctor may periodically check for them.

Posture: Women tend to have increasing arch in their back (lordosis) during pregnancy in order to keep their center of gravity over their legs. Unfortunately, this often causes lower back pain.

In addition, a substance called relaxin is released during pregnancy. This serves to loosen the pelvic joints, making delivery easier, but also tends to increase lower abdominal and back pain. These symptoms tend to resolve after delivery of the baby.

Genital herpes and pregnancy

noreply@blogger.com (Anonymous) — Fri, 19 Jun 2009 03:47:00 +0000

If you have herpes should you give up your plans to have children?

No. Since herpes is spread from active skin infection and not from latent infection, a newborn baby can be infected with herpes only if he or she is born while the virus is active. Neonatal herpes generally occurs if the baby's skin becomes infected during the birth process. If herpes is latent in the mother, there is no virus along the birth canal to infect the baby. If herpes sores are present at the time of labor, then, and only then, a cesarean section may be required to reduce the possibility of direct contact between the infection and the baby. Before birth, the membranes surrounding the baby are a natural barrier that helps to prevent the virus from traveling from the mother's skin to the baby's skin. If the membranes rupture (the bag of water breaks) and a herpes sore on or near the vagina is active, a cesarean section is often performed as an emergency operation. If no sores are present, however, normal labor may safely proceed. Many centers are now studying the use of regular oral acyclovir during the last 2 to 4 weeks of pregnancy to prevent reactivations and allow for a normal vaginal delivery.

Can a fetus become infected with herpes inside the womb?

Yes. In this situation, herpes could have a harmful effect on the fetus before birth. This syndrome of congenital herpes is very rare. Some physicians believe that primary herpes (the first episode of herpes) in the mother may lead to infection in the womb, especially if primary herpes occurs in early pregnancy. However, the overwhelming majority of women who have primary herpes during the first 2 trimesters of pregnancy give birth to perfectly normal babies. Primary herpes in early pregnancy is not considered an absolute indication for abortion, although some women in this situation may choose to have abortions.

One study from Seattle showed that one in 5 such situations (true primary herpes in the first trimester of pregnancy) led to a miscarriage where the fetus was shown to have been affected by herpes in the uterus. Because this situation is so uncommon, the study may have underestimated or overestimated the true incidence. Follow-up unpublished studies from the same medical center suggest that one in 5 may be an overestimate.

Nothing specific can be done to prevent congenital herpes, but the risk is very low. In fact, even women with a proven herpes infection inside the womb often have completely normal and unaffected babies. Most healthy and well-nourished babies who are born to women with herpes are very unlikely to develop problems.

How to avoid passing on herpes to your baby

In order to avoid giving herpes to your baby, you must also tell your doctor that you have herpes or that a previous partner had or your present partner has herpes. During labor, the doctor will carefully inspect your genitals, especially the external genital area, for herpes sores. You must take an active role and discuss the problem well in advance with your doctor. Regular, careful examinations of the external genitals by your physician during the last 2 or 3 weeks of pregnancy may be useful, depending upon how frequently you get recurrences. You and the doctor should increase your awareness of your herpes outbreaks - what they feel like, what they look like, and so on. If possible, your doctor will take a herpes culture from the skin around the vagina during labor; in the unlikely event that a sore has been missed, there will be time to watch and treat the baby, if necessary. The chances that a mother with recurrent genital herpes will give birth to a baby who becomes ill with neonatal herpes are only about one in several thousands, as long as you and your doctor are aware of the status of your infection and are attuned to prevention.

Epilepsy & pregnancy

noreply@blogger.com (Anonymous) — Tue, 26 May 2009 07:49:00 +0000

What happens if I have epilepsy and become pregnant?

In perspective, about one woman in 200 has epilepsy. Given that a little less than half of those women are of child-bearing age, in a city of a million people we can expect there to be more than 1,000 women with epilepsy who at some point might plan to get pregnant.

What are the risks to the mother?

Generally speaking the frequency and severity of seizures does not change very much during pregnancy.

What is the risk to the baby?

Firstly, the developing baby is at some risk from direct trauma to the mother's abdomen sustained during a major seizure. There is also risk of temporary lack of oxygen to the fetus brought on by a major maternal seizure. A minor seizure, without falling or any type of convulsive element, is very unlikely to cause harm to the developing baby.

Another area of concern is that anti-epileptic drugs (AEDs) can cause birth defects ranging from mild (e.g., harelip, slight shortening of the fingers) to severe (e.g., major heart defects, neural tube defects such as spina bifida). Those abnormalities, as well as others, occur in about 2% of babies born to healthy, medication-free non-epileptic women. This risk increases to about 4% for epileptic women not taking medications to the region of 5 or 6% in epileptic women on AEDs. Thus the risk is small but tangible.

Is it wise to stop medication to prevent fetal malformations?

Gradual stopping of medication under medical supervision certainly can be considered if the epilepsy is very mild (e.g., seizure-free for two years). If medication is withdrawn it should be done before becoming pregnant because the major organs are already forming in the growing embryo within weeks of conception, even before knowing that one is pregnant. See your doctor before making any plans!

Is there anything else I can do to prevent fetal malformation from medication?

Daily folic acid supplements can reduce the risk of neural tube defect. Folic acid is now recommended to all women throughout their childbearing years, whether or not they are pregnant or plan to get pregnant.

Do some AEDs harm the baby less or more than others?

There are differences but the differences are not very great. Whether any of the newer, recently released AEDs are any safer, is not yet known. The preference is to take an AED that best suits your type of epilepsy.

What tests can I have when pregnant, to know if my baby has been harmed by AEDs?

Maternal blood testing at around 16 weeks can help establish that the developing fetus is healthy and without major defects. This is done by screening mother's blood for three special markers. This test is called "triple marker screening" or TMS for short. The test is not perfect; whereas a negative screen does not guarantee a normal baby, it is correct 99% of the time. A positive screen result for fetal deformity can be followed by amniocentesis (analysis of fluid from the birth sac), and fetal ultrasound examination, for detection of defects.

Can I breastfeed and still be on AEDs?

Contrary to previous beliefs, the answer is now yes. It is now known that only relatively small amounts of the following medications find their way into the breast milk: phenytoin, carbamazepine, and valproic acid, all of which are sanctioned for breastfeeding mothers by the American Academy of Pediatrics.

What is the bottom line?

Except when the epilepsy is very mild, it is better to carry on with AED treatment before and during a planned pregnancy. Whereas the baby can be harmed by medication, this risk has to be set against damage to the developing baby from an uncontrolled seizure or (worse still) a series of seizures not covered by medication. It is really a question of which risk is the smaller one. Continuing with an AED usually wins out.

In conclusion, although there are certain risks to the epileptic mother and her developing baby, those risks are relatively small and are not insurmountable. The fact of the matter is that given good care, a healthy infant is produced in more than 90% of pregnancies occurring in women with epilepsy. The decision whether or not to conceive is clearly a personal one that should be discussed in full with one's partner and personal physician.

Pregnancy: how to prepare

noreply@blogger.com (Anonymous) — Wed, 20 May 2009 04:22:00 +0000

Having a child is one of the most exciting, and stressful, experiences in life. A bit of knowledge and preparation can increase the likelihood of a healthy baby, and can give would-be parents some peace of mind.

What lifestyle changes can I make to help ensure a successful pregnancy?

A healthy lifestyle is always a very good idea, and never is this more true than before and during pregnancy. Things to strive for:

Eat well. Eat a balanced diet, making sure to include lots of green leafy vegetables and legumes. These will provide folic acid, one of the B-vitamins, which prevents birth defects such as spina bifida (a disorder of the spinal cord).
Take a daily multivitamin with folic acid. Take a daily multivitamin that contains at least 0.4 mg of folic acid to ensure that you have enough nutrients to feed your baby and to reduce the risk of fetal birth defects. Women with epilepsy, diabetes, a family history of neural tube defects (birth defects affecting the spinal cord), or previous pregnancies affected by neural tube defects will need a higher dose of folic acid per day.
Start taking folic acid well before you get pregnant. Talk to your doctor about how much folic acid you will need to take well before you start trying to get pregnant. It is important to take folic acid at least 10 weeks prior to conception, and given that 50% of pregnancies are unexpected, it's best for all women of child-bearing age to take folic acid even if they don't plan to become pregnant.
Exercise regularly. Regular exercise can help prepare your heart for pregnancy and can help you handle the stresses of pregnancy.
Watch your weight. An ideal weight will optimize your chances of successful pregnancy. Ask your doctor what's ideal for you.
Stop smoking. There is no better time to kick the habit, and there is no more important time either. Your health care professional can help.
Decrease your intake of caffeine. Decrease your intake of caffeine (which is found in coffee, tea, cola beverages, and some medications).
Stop drinking alcohol. There is no established safe amount one can drink during, or before, pregnancy.
Stop drug use and stay away from strong chemicals. Discuss with your physician before using any drugs or nonessential medications, and avoid exposure to strong chemicals or toxins.
Learn as much as you can about pregnancy. Read, listen, and talk to your friends and health professionals.
Discuss family issues with your partner regularly. It's best to start discussing family issues even before getting pregnant, and it's especially important to continue these discussions during the pregnancy, as well as after the birth. Having a baby can be a wonderful addition to a family, as long as both partners are ready.
See your doctor regularly. This is another important part of preparing for pregnancy.

Diagnosis

noreply@blogger.com (Anonymous) — Fri, 15 May 2009 11:28:00 +0000

The beginning of pregnancy may be detected in a number of different ways, either by a pregnant woman without medical testing, or by using medical tests with or without the assistance of a medical professional.

Most pregnant women experience a number of symptoms, which can signify pregnancy. The symptoms can include nausea and vomiting, excessive tiredness and fatigue, craving for certain foods not normally considered a favorite and frequent urination particularly during night.

A number of early medical signs are associated with pregnancy. These signs typically appear, if at all, within the first few weeks after conception. Although not all of these signs are universally present, nor are all of them diagnostic by themselves, taken together they make a presumptive diagnosis of pregnancy. These signs include the presence of human chorionic gonadotropin (hCG) in the blood and urine, missed menstrual period, implantation bleeding that occurs at implantation of the embryo in the uterus during the third or fourth week after last menstrual period, increased basal body temperature sustained for over two weeks after ovulation, Chadwick's sign (darkening of the cervix, vagina, and vulva), Goodell's sign (softening of the vaginal portion of the cervix), Hegar's sign (softening of the uterus isthmus), and pigmentation of linea alba - Linea nigra, (darkening of the skin in a midline of the abdomen, caused by hyperpigmentation resulting from hormonal changes, usually appearing around the middle of pregnancy).

Pregnancy detection can be accomplished using one or more of various pregnancy tests which detect hormones generated by the newly-formed placenta. Clinical blood and urine tests can detect pregnancy soon after implantation, which is as early as 6-8 days after fertilization. Blood pregnancy tests are more accurate than urine tests. Home pregnancy tests are personal urine tests, which normally cannot detect a pregnancy until at least 12-15 days after fertilization. Both clinical and home tests can only detect the state of pregnancy, and cannot detect the age of the embryo.

In the post-implantation phase, the blastocyst secretes a hormone named human chorionic gonadotropin which in turn, stimulates the corpus luteum in the woman's ovary to continue producing progesterone. This acts to maintain the lining of the uterus so that the embryo will continue to be nourished. The glands in the lining of the uterus will swell in response to the blastocyst, and capillaries will be stimulated to grow in that region. This allows the blastocyst to receive vital nutrients from the woman.

Despite all the signs, some women may not realize they are pregnant until they are quite far along in their pregnancy, in some cases not even until they begin labour. This can be caused by many factors, including irregular periods (quite common in teenagers), certain medications (not related to conceiving children), and obese women who disregard their weight gain. Others may be in denial of their situation.

An early sonograph can determine the age of the pregnancy fairly accurately. In practice, doctors typically express the age of a pregnancy (i.e. an "age" for an embryo) in terms of "menstrual date" based on the first day of a woman's last menstrual period, as the woman reports it. Unless a woman's recent sexual activity has been limited, or she has been charting her cycles, or the conception is as the result of some types of fertility treatment (such as IUI or IVF) the exact date of fertilization is unknown. Absent symptoms such as morning sickness, often the only visible sign of a pregnancy is an interruption of her normal monthly menstruation cycle, (i.e. a "late period"). Hence, the "menstrual date" is simply a common educated estimate for the age of a fetus, which is an average of two weeks later than the first day of the woman's last menstrual period. The term "conception date" may sometimes be used when that date is more certain, though even medical professionals can be imprecise with their use of the two distinct terms. The due date can be calculated by using Naegele's rule. The expected date of delivery may also be calculated from sonogram measurement of the fetus. This method is slightly more accurate than methods based on LMP. The beginning of labour, which is variously called confinement or childbed, begins on the day predicted by LMP 3.6% of the time and on the day predicted by sonography 4.3% of the time.

Diagnostic criteria are: Women who have menstrual cycles and are sexually active, a period delayed by a few days or weeks is suggestive of pregnancy; elevated B-hcG to around 100,000 mIU/mL by 10 weeks of gestation.

Duration & Childbirth

noreply@blogger.com (Anonymous) — Thu, 14 May 2009 05:43:00 +0000

Duration

The expected date of delivery (EDD) is 40 weeks counting from the last menstrual period (LMP) and birth usually occurs between 37 and 42 weeks,^[11] The actual pregnancy duration is typically 38 weeks after conception. Though pregnancy begins at conception, it is more convenient to date from the first day of a woman's last menstrual period, or from the date of conception if known. Starting from one of these dates, the expected date of delivery can be calculated. 40 weeks is nine months and six days, which forms the basis of Naegele's rule for estimating date of delivery. More accurate and sophisticated algorithms take into account other variables, such as whether this is the first or subsequent child (i.e. pregnant woman is a primip or a multip, respectively), ethnicity, parental age, length of menstrual cycle and menstrual regularity.

Pregnancy is considered 'at term' when gestation attains 37 complete weeks but is less than 42 (between 259 and 294 days since LMP). Events before completion of 37 weeks (259 days) are considered pre-term; from week 42 (294 days) events are considered post-term.^[12] When a pregnancy exceeds 42 weeks (294 days), the risk of complications for woman and fetus increases significantly.^[11]^[13] As such, obstetricians usually prefer to induce labour, in an uncomplicated pregnancy, at some stage between 41 and 42 weeks.^[14]^[15]

Recent medical literature prefers the terminology pre-term and post-term to premature and post-mature. Pre-term and post-term are unambiguously defined as above, whereas premature and postmature have historical meaning and relate more to the infant's size and state of development rather than to the stage of pregnancy.^[16]^[17]

Fewer than 5% of births occur on the due date; 50% of births are within a week of the due date, and almost 90% within two weeks.^[18] It is much more useful, therefore, to consider a range of due dates, rather than one specific day, with some online due date calculators providing this information.

Accurate dating of pregnancy is important, because it is used in calculating the results of various prenatal tests (for example, in the triple test). A decision may be made to induce labour if a fetus is perceived to be overdue. Furthermore, if LMP and ultrasound dating predict different respective due dates, with the latter being later, this might signify slowed fetal growth and therefore require closer review.

The Age of Viability has been receding relentlessly as medical revolution continues to unfold. Whereas it used to be 28 weeks, this has been brought back to as early as 23 weeks [22 weeks in a few countries]. Unfortunately, there has been a profound increase in morbidity and mortality associated with the increased survival to the extent it has led some to question the ethics and morality of resuscitating at the edge of viability.

Childbirth

Childbirth is the process whereby an infant is born. It is considered by many to be the beginning of a person's life, and age is defined relative to this event in most cultures.

A woman is considered to be in labour when she begins experiencing regular uterine contractions, accompanied by changes of her cervix — primarily effacement and dilation. While childbirth is widely experienced as painful, some women do report painless labours, while others find that concentrating on the birth helps to quicken labour and lessen the sensations. Most births are successful vaginal births, but sometimes complications arise and a woman may undergo a cesarean section.

During the time immediately after birth, both the mother and the baby are hormonally cued to bond, the mother through the release of oxytocin, a hormone also released during breastfeeding.

Perinatal period

noreply@blogger.com (Anonymous) — Tue, 12 May 2009 10:06:00 +0000

Perinatal period

Perinatal defines the period occurring "around the time of birth", specifically from 22 completed weeks (154 days) of gestation (the time when birth weight is normally 500 g) to seven completed days after birth. ^[10]

Legal regulations in different countries include gestation age beginning from 16 - 22 weeks (5 months) before birth.

This article is about prenatal development in humans. For other species, see prenatal development (non-human).

"Unborn child" redirects here; for other uses, see unborn child (disambiguation).

Prenatal or antenatal development is the process in which an embryo or fetus (or foetus) gestates during pregnancy, from fertilization until birth. Often, the terms fetal development, foetal development, or embryology are used in a similar sense.

After fertilization the embryogenesis starts. In humans, when embryogenesis finishes, by the end of the 10th week of gestational age, the precursors of all the major organs of the body have been created. Therefore, the following period, the fetal period, is described both topically on one hand, i.e. by organ, and strictly chronologically on the other, by a list of major occurrences by weeks of gestational age.

Postnatal period

Postnatal (Latin for 'after birth', from post meaning "after" and natalis meaning "of birth") is the period beginning immediately after the birth of a child and extending for about six weeks. A more correct^{[citation needed]} term would be postpartum period, as it refers to the mother (whereas postnatal refers to the infant). Less frequently used is puerperium.

Biologically, it is the time after birth, a time in which the mother's body, including hormone levels and uterus size, return to prepregnancy conditions. Lochia is post-partum vaginal discharge, containing blood, mucus, and placental tissue.

During the first stages of this period, the newborn also starts his/her adaptation to extrauterine life, the most significant^{[citation needed]} physiological transition until death.

In scientific literature the term is commonly abbreviated to PX. So that 'day P5' should be read as 'the fifth day after birth'.

Progression

noreply@blogger.com (Anonymous) — Tue, 12 May 2009 10:03:00 +0000

Initiation

Pregnancy occurs as the result of the female gamete or oocyte being penetrated by the male gamete spermatozoon in a process referred to, in medicine, as "fertilization", or more commonly known as "conception". After the point of "fertilization" it is referred to as an egg. The fusion of male and female gametes usually occurs through the act of sexual intercourse. However, the advent of artificial insemination and in vitro fertilisation have also made achieving pregnancy possible in cases where sexual intercourse does not result in fertilization (e.g. through choice or male/female infertility).

Terminology

noreply@blogger.com (Anonymous) — Tue, 12 May 2009 10:01:00 +0000

One scientific term for the state of pregnancy is gravid, and a pregnant female is sometimes referred to as a gravida.Neither word is used in common speech. Similarly, the term "parity" (abbreviated as "para") is used for the number of previous successful live births. Medically, a woman who has never been pregnant is referred to as a "nulligravida", and in subsequent pregnancies as "multigravida" or "multiparous".Hence during a second pregnancy a woman would be described as "gravida 2, para 1" and upon delivery as "gravida 2, para 2". An in-progress pregnancy, as well as abortions, miscarriages or stillbirths account for parity values being less than the gravida number, whereas a multiple birth will increase the parity value. Women who have never carried a pregnancy achieving more than 20 weeks of gestation age are referred to as "nulliparous". The medical term for a woman who is pregnant for the first time is primigravida.

The term embryo is used to describe the developing offspring during the first eight weeks following conception, and the term fetus is used from about two months of development until birth.

In many societies' medical or legal definitions, human pregnancy is somewhat arbitrarily divided into three trimester periods, as a means to simplify reference to the different stages of prenatal development. The first trimester carries the highest risk of miscarriage (natural death of embryo or fetus). During the second trimester, the development of the fetus can be more easily monitored and diagnosed. The beginning of the third trimester often approximates the point of viability, or the ability of the fetus to survive, with or without medical help, outside of the uterus.

introducing of PREGNANCY

noreply@blogger.com (Anonymous) — Tue, 12 May 2009 09:55:00 +0000

Pregnancy (latin graviditas) is the carrying of one or more offspring, known as a fetus or embryo, inside the uterus of a female. In a pregnancy, there can be multiple gestations, as in the case of twins or triplets. Human pregnancy is the most studied of all mammalian pregnancies. Obstetrics is the surgical field that studies and cares for high risk pregnancy. Midwifery is the non-surgical field that cares for pregnancy and pregnant women.

Childbirth usually occurs about 38 weeks after conception, i.e., approximately 40 weeks from the last normal menstrual period (LNMP) in humans. The World Health Organization defines normal term for delivery as between 37 weeks and 42 weeks. The calculation of this date involves the assumption of a regular 28-day period.