What are the first signs of pregnancy?

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781

Summary:

Pregnancy is to perform one or more embryos or fetuses of female mammals, including humans, in their respective institutions. Pregnancy may be more twins (for example, double or triple). Pregnancy is the most extensively studied all mammals of pregnancy.

Pregnancy takes approximately 9 months between the time of the last menstrual cycle and childbirth (38 weeks after fertilization). The medical term for a pregnant woman is genetalian, just...

Keywords:

the first signs of pregnancy, pregnancy, pregnancy tests of fertilization

The text of the article:

Pregnancy is to perform one or more embryos or fetuses of female mammals, including humans, in their respective institutions. Pregnancy may be more twins (for example, double or triple). Pregnancy is the most extensively studied all mammals of pregnancy.

Pregnancy takes approximately 9 months between the time of the last menstrual cycle and childbirth (38 weeks after fertilization). The medical term for pregnant women is genetalian, as well as the medical term for a potential embryo baby (weeks), then the fetus (until the birth).

A woman who is pregnant, the first is called primigravida or gravida 1: a woman who has never been pregnant, is called gravida 0; Similarly, para, para 1 of the conditions of 0 and so on are used for the woman is given by the birth of the time.

In many companies, medical and legal definitions of pregnancy was somewhat arbitrarily divided into three periods of the quarter, as a means to facilitate the reference to different stages of development of the fetus.

The Q1 period brings the greatest risk of miscarriage (natural death of embryos and fetuses). In the second quarter, you can start the development of the fetus fetus be monitored and diagnosed. 3Rd quarter starts viability, which means that the fetus can survive at the beginning of the birth.

Before pregnancy, female ovum (egg) must attach, sperm male in a process referred to in the medical field as an "improvement", or General (even though it might be incorrectly) such as "design".

In most cases occurs by means of an act of intercourse, when a man ejaculates to women, thus releasing sperm. Of pregnancy begins at implantation, is often appropriate to this day the first day of last menstruation is a woman. It is used for the calculation of the estimated date of delivery (ESD).

Traditionally (according to Naegele rule that is used to calculate the expected date of delivery or EDD) pregnancy is considered the last approximately 40 weeks (280 days) of the last period (LMP) rules or 37 weeks of the date of fertilization (259 days). Pregnancy, however, it has a mandate between 37 and 43 weeks since the beginning of the last menstruation. Born before 37 weeks behind marker premature, while he is born after the tag week 43 were considered postmature.

According to Merck, the standard for pregnancy is 266 days from the date of fertilization. 38 Weeks or months, as well as the Gregorian approximately 8 days 22.5 or lunar month 9.0). Counting from the beginning of the last menstrual cycle of a woman, the standard is 40 weeks (the base of its Naegele rule).

According to the same link, less than 10% of births occur on the due date, 50% of births are one week after the due date and almost 90% within two weeks. But it is not known if it is the date calculated from the beginning of the last menstruation or sonograph (see workplan lower).

Although it is average, the actual length of the pregnancy depends on various factors. For example, the first pregnancy is longer than subsequent pregnancy.

The exact date of fertilization is important because it is used in the calculation of the results of different prenatal tests (e.g. triple test). The decision may be made to induce labour, if the child is considered delayed. Maturity date is only a rough estimate, and the process is exactly the year pregnancy is complicated by the fact that not all women have rules cycle of 28 days or about the 14th day after ovulation period their last menstrual. Approximately 3.6% of all women delivered on the due date of the extrapolation of the LMP and 4.7% to give birth on the day of the extrapolation of ultrasound.

Early pregnancy can be detected in various ways, including the various tests, pregnancy hormones of the newly created the placenta. Clinical examination of the blood and urine test to detect pregnancy shortly after implementation, which is just as early as 6-8 days after fertilization. Home pregnancy tests are tests personal pregnancy urine normally can not detect every 12-15 days after fertilization. Domestic and clinical trials, you can only determine the status of the pregnancy, and you cannot determine its age.

Implementation of post-blastocyst stage secretes hormones, called, human chorionic gonadotropin, which in turn stimulates the corpus luteum in the ovary of a woman to continue the production of progesterone. This works to maintain the lining of the uterus so that embryos will continue to be fed. In response, the blastocyst is swelling of the glands in the lining of the uterus and kapilár will stimulate growth in the region. Thanks to the blastocyst receive essential nutrients for a woman. The presence of human chorionic gonadotropin pregnancy tests.