It is important for every expectant mother not only to know that her child is a boy and a girl, but also the duration of the fetus and when it will be born. Knowing the duration of the fetus allows you to monitor the development of the baby in the womb and changes in the mother's body. Here are some ways to determine fetal age:
I. DETERMINATION BY MENSTRUAL CYCLE.
Determining a pregnant woman's last menstrual period based on the date of onset is called the obstetric period, and this method is suitable for women who have regular menstrual periods and walk 2 weeks longer than the pregnant woman's estimated period. If you go to a women’s consultation a week after your period and think your fetus is three weeks old, gynecologists will tell you it is 5 weeks.
By knowing the exact day of menstruation, you can determine when your baby will be born. This method is called the Negel method, which removes three months from the first day of the last menstrual period and adds 7 days. The date of creation is your date of birth.
II. DETERMINATION WITH ULTRASONIC INSPECTION (UZI).
Using ultrasound, the fetus can be detected as early as 2-3 weeks. In addition, ultrasound allows to determine not only the presence of pregnancy, but also its location (in the uterus, fallopian tubes), the condition of the fetus (growing, underdeveloped), heart rate from 4-5 weeks, movement from 9 weeks. It is based on parameters such as fetal head circumference, abdominal circumference, and hip length when detected using ultrasound.
III. DETERMINATION WITH THE HORMONE OF CHORIONAL GONADOTROPIN (XG).
After the fertilized egg attaches to the uterus (6-7 days), the amount of XG hormone begins to increase rapidly and reaches its maximum at 8-9 weeks. Under the influence of this hormone in the first trimester of pregnancy stimulates the release of estrogen and progesterone, female hormones that ensure the normal development of the child. Then the amount of XG gradually decreases. Pregnancy and its week can be determined by submitting a blood test to XG 10 days after ovulation. There are special tables on what XG will have in which week, and a two- to three-fold increase in its norm can in turn provide information about fetal twins. If the amount of XG is less than the estimated time, it is possible to talk about the fact that the child is underdeveloped or at risk of falling.
IV. DETERMINATION WITH EXPRESS TESTS.
There are a number of rapid tests to detect pregnancy, the mechanism of action of which is based on the amount of chorionic gonadotropin excreted in the urine. Therefore, it is recommended to perform the tests during the period when this hormone is increased in the blood - 1-2 days after the onset of menstruation. There are several types of these tests:
1. Paper test. The cheapest and easiest way. The morning urine is taken to a sterile jar and filled with the desired side of the test. During pregnancy, two stripes of the same color appear.
2. Tablet test. A slightly expensive but easy to use method. Urine is instilled into a special test tube in a plastic cassette using the pipette tube included. You can know the result after a few minutes.
3. Digital electronic test. It is currently the only test method that provides information about pregnancy and its duration, and is sensitive to 99%. In this case, after the test, the test screen will show a negative or positive sign and a number from 1 to 40, ie the week of pregnancy, if there is a pregnancy.
V. DETERMINATION ON THE BASIS OF A DOCTOR'S EXAMINATION.
Experienced doctors can determine the duration of the fetus with a difference of 2-3 days using a gynecological examination. In the early stages of the fetus, gynecologists can assess the swelling and softening of the mucous membranes of the vagina and cervix, and from 12-14 weeks of the fetus can determine the size of the uterus and the location of its bottom. It is also possible to compare the gestational age by measuring the circumference of the abdomen using a centimeter tape.
VI. DETERMINATION BY THE FIRST MOVEMENT OF THE FETURE.
The movement of the baby is a sign that the pregnancy is going well. In fact, the baby’s first movements coincide with the formation of his brain, starting at 9 weeks and having a tetanic appearance. This can only be determined by ultrasound examination. Fetal movement in women in the first birth can be felt from 20 weeks of gestation, and in women of rebirth at 18 weeks.
DETERMINATION WITH ONLINE CALCULATOR.
A number of websites recommend an online system for determining fetal age. They can be used not only to determine the duration of the fetus, but also to know the period of growth of the child and when it is born. Including https://my-infant.com/ru-ru/home/pregnancyinput.
