determination of pregnancy by ultrasound


  • How to determine the gestational age
  • How to determine the gestational age of the first baby move
  • Determination of gestational age by week during the inspection doctor
  • How to determine how many weeks of pregnancy, the monthly
  • Determination of gestational age by ultrasound
  • How to determine the gestational age of HCG

Determination of gestational age and the estimated date of delivery is of great practical importance associated with them provide prenatal leave, the definition of premature birth (premature birth), and perenashivanie, the ability to track the formation of the fruit, in accordance with the periods of its development.
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How to determine the gestational age

The exact period of pregnancy is important for elective Caesarean section (to avoid premature surgery), if a pregnant woman is sick with diabetes (during childbirth complications may occur, if the fetus is larger than normal).

Determination of gestational age allows to diagnose abnormalities of fetal development disorders (eg, Down syndrome) and accurately determine the date of delivery. When the doctor is known period using ultrasound can be associated with generally accepted characteristics and performance of the fetus to a particular pregnancy. So, how to determine the time of pregnancy?

It would seem self-definition of the term - a simple affair. The following formula generally accepted calculation: among the first day of the last menstrual period is necessary to add 280 days (40 weeks, 9 calendar months or 10 obstetric). Basically, the definition of the approximate date of delivery easier: from the first day of the last menstrual period is counted 3 months ago, and to this is added the number of 7 days. For example, the beginning of the last menstrual period dropped by 15 December then, count 3 months ago (September 15), and adding 7 days to get the date of birth (September 22).

But this formula does not always give an accurate result. Features of the woman's body and the developing child can make significant adjustments. 280 days - this is the average duration of the pregnancy, however, in each case may be variations in the range of from 38 to 42 weeks. 2-week variation is normal. As a rule, girls are born a little earlier than boys, who, on the contrary, in no hurry to get acquainted with the surrounding world.

Determination of gestational age at conception

Explore the gestational age can be by date of conception or ovulation. The chance of getting pregnant ovulation is very high. The main difficulty lies in the fact that in the early days and sometimes weeks of pregnancy no reliable signs are not evident. And although its definition using a number of signs, the exact date of fertilization is still conjectural, as the symptoms themselves largely conjectural (especially in the early weeks).

Conception of a child - is a fusion of sperm and egg, which occurs within a day or 2 after ovulation. Some women may determine its own for some symptoms, others for its detection acquire special tests, while others measure their basal temperature - the temperature in the rectum.

The first half of the menstrual cycle characteristic of the temperature more than 37 ° C. The day before ovulation, the temperature will drop slightly, then to rise to 37-37, 2 ° C. This makes it possible to calculate the exact date of conception, provided that it has happened in the period of measurement. Those women who feel ovulation and know the day of conception, independently determine the date of the easiest pregnancy.

But even with the exact calculation of the date of conception (if sexual intercourse was once) a number of reasons put gynecologists longer period of 2 weeks. Women believe this is a sign of carrying a large baby. But in the early weeks of the size of the embryos do not differ. Gynecologists simply stating gestation (gestation). On it is calculated and the date of birth of the future. Therefore, to know the period of the day of conception is interesting is not the doctor, and the woman herself. By the way, some women are their calendar. Then it will be interesting to compare the calendar and the medical term, to determine which was more accurate.

 determination of pregnancy by month
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How to determine the gestational age of the first baby move

An important parameter of pregnancy is the first stirring of a child. After all, doctors have been known to take into account the future delivery date, depending on the results of ultrasound in the first trimester and date of the first baby move. Women who give birth for the first time, felt these perturbations in the 20th week, and multiparous little earlier - in the 18th week.

But often nulliparous women who give birth and re-feel baby move already from 15-16 weeks, though some expectant mothers may be up to 21-22 weeks did not feel the fetal movements. This is due to the activity of the child, with its position in the uterus, as well as with the sensitivity of the uterine wall. In addition, enhanced bowel many women perceive as the movement of the child. Besides, new moms often flatulence.
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Determination of gestational age by week during the inspection doctor

When a pregnant woman comes to the doctor for the first time, the gynecologist examines her necessarily on a chair. Survey helps determine how long, and to identify existing problems. Good doctors accurately determine the gestational age (up to half of the week), and the location of the fetus in the uterus.

You need to know that when a woman gynecological examination at a delay of 3-4 weeks, ie 5-6 weeks of pregnancy, there is a slight increase in the uterus. Its size is approximately equal to the chicken egg. And on the eighth week, the uterus is already the size of a goose egg. At 10 weeks of pregnancy, it is the size of a woman's fist. After 12-14 weeks the doctor without problems determines the size of the uterus. In this case we are talking about the length of the uterus during the inspection of a woman on the couch. At the same gynecologist using measuring tape.

 determination of pregnancy by hCG
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How to determine how many weeks of pregnancy, the monthly

Definition of the monthly period called obstetric. How it is calculated? Find out how many weeks, it is not difficult, as in this case, the period of ovulation is not taken into account. The length of the menstrual period is also unimportant. The doctor should know the number of the first day of the last menstrual period. It is from this date gynecologist begins to count the period of pregnancy. For example, if you went to a doctor a week after the delay and assured that the deadline is 3 weeks, the gynecologist put 5 weeks.
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Determination of gestational age by ultrasound

As a rule, the first ultrasound examination administered in 12-14 weeks of pregnancy. But in these weeks to establish its accuracy is difficult, because all the moms embryos develop the same only in the first few weeks after conception. Then the doctor can determine the time to within 1 day, in the absence of heart to clarify the location of the child. And if during the ultrasound detected any abnormalities, the follow-up study is assigned a week or 10 days for more accurate determination of pathologies and exclusion of non-viable pregnancy.

That is possible for ultrasound to determine the term only in the early weeks. During the next two ultrasound the doctor will put a term depending on the parameters of the body of the child, his head. But do not forget that the second half of pregnancy - is the individual development of children. It is a normal term birth in boys and girls weighing 2800 g and 4000 g

 definition of pregnancy during the inspection at the doctor
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How to determine the gestational age of HCG

Human chorionic gonadotropin (hCG) - one of the important indicators of the presence of pregnancy, its normal flow. HCG - a hormone produced in a woman's body after the introduction of the uterine wall of the ovum, that is, after the implantation of the embryo. This has been going on day 6-8 after fertilization of female ova. The presence in the blood and urine of this particular hormone is the basis of pregnancy tests. Conventional tests are sold in pharmacies, determine the presence of this hormone the two strips.

This hormone is in the first trimester stimulates the production of estrogen and progesterone - the two female hormones needed to maintain a normal pregnancy. In the first weeks of hCG doubles approximately every 2-3 days. Raising it to 60% in 2 days is the norm. The bigger the term, the lower the growth of hCG. At 8-9 weeks of pregnancy rate hCG levels ceases to grow. He begins, in contrast, the slow pace of decline.

Incidentally, in the case of multiple levels of the hormone increases depending on the number of fruits. 2 If the fetus is the level of hCG will be 2 times higher than normal. The generally accepted standard norms of the hormone are considered major determinants of this period.

Please note that the deadline for HCG does not coincide with obstetric. This is because pregnancy chorionic gonadotropin is stated with respect to the date of conception. It shows the age of the child. But OB calculations determined by the physician as to the date of last menstrual period and are not associated with the day of conception the baby.

So, all of these options it is possible to accurately determine the gestational age. Nevertheless, it should take into account the fact that even with the correct calculations of the child may be born earlier and later. Therefore, the main task of the future mother - to do everything possible for a normal pregnancy and prosperous appearance of the baby born.

 Determination of gestational age: options