How to Calculate Pregnancy
Probably, every woman who gave birth to a child,noticed that the gestation period, which was put by her gynecologist, is about one to two weeks longer than the actual one. How to calculate the so-called obstetric pregnancy?
The obstetric period is more preciseterm pregnancy of a woman. In general, pregnancy begins with the moment of immediate conception, that is, the fertilization of an egg with a sperm cell. Most often it occurs in any of the days of ovulation. That's why, if a woman knows the day when her body has ovulated, she can determine her pregnancy much more accurately. However, experts argue that such a calculation is not entirely suitable for conducting and controlling the course of pregnancy. It is quite easy to explain this. The fact is that every woman is individual. She has her own menstrual cycle, the day of ovulation and physical characteristics. Ovulation does not always happen in the middle of the menstrual cycle. In addition, there may be moments of repeated ovulation. It is for this reason that it is simply impossible to calculate the embryonic term for a hundred percent in advance.
Since ancient times, every woman knows thatabsence of menstruation is one of the symptoms of pregnancy. Each future mother tried to calculate the exact time. The term began to count precisely from the last menstruation. To date, most gynecologists are much easier to observe the course of pregnancy, focusing on a term called obstetric.
In the people it is commonly believed that the child will be bornin nine months. However, what month to take as a basis, very few people know. It is worth noting that there are very specific figures that are used in calculating the duration of a woman's pregnancy. Each gynecologist, as a rule, calculates an obstetric term. It begins with the day when the last months began. In total, difficult pregnancy lasts forty obstetric weeks. This value corresponds to two hundred and eighty days.
The date of birth can be calculated directlyin several ways. For example, some women add to the first day of their last month's two hundred and eighty days. The simplest method is the formula, according to which seven days are added to the day of the onset of menstruation. From this date, you need to subtract three months. The third method involves summing the first day of the month, which was the last time, seven days and nine months. It is also worth noting that a rather large percentage of women give birth to children on the thirty-eighth or forty-second week of pregnancy. Therefore, the calculated date of birth is always considered to be conjectural.
The duration of pregnancy rarely coincides withcalculations made by a gynecologist. It is necessary to rely, first of all, on the dates that the obstetrician-gynecologist leads. Of course, at first it is not easy to understand why this value should be taken as a basis. Many future mothers begin to strongly resent, because they know better the specific day of conception of the baby. Do not worry about it, because such a period of pregnancy is necessary only for the correct and accurate observation of the course of a particular pregnancy. With the help of such calculations, the doctor prescribes tests and examinations, which each woman undergoes at the same time.
In order to better clarify the gestational agea woman often goes for ultrasound. In such a study, a specialist evaluates the development of the fetus, based on the obstetric age, since it is considered the most important during the entire pregnancy. If the data in this case are very different from each other, additional examinations are carried out.
It is important to know that even the first weeks before conceptionthe baby is very important. During this period, the egg ripens, which can affect absolutely any negative influence. For this reason, the first two weeks after the last menstrual discharge are taken into account by gynecologists.