To date, every pregnant womanhas the ability to bear a healthy fetus, since modern equipment allows you to diagnose not only the duration of pregnancy, but also to exclude the possibility of developing some abnormalities or pathologies in the development of a future child. So, by determining the age of the fetus, midwives make a large number of measurements and compare the results with the set values. The most accurate parameter that determines the development of the future baby is the CTE of the fetus, that is, its coccygeal-parietal size. It is measured by ultrasound, most often at a period of up to eleven weeks, since the accuracy of measurements decreases from the twelfth week. According to the KTR of the embryo, you can determine not only the length of pregnancy, but also the size and approximate weight of the baby.

In the special table the values ​​of KTRfetus for weeks, they are the average indicator of the norm, because small fluctuations in the development of a future child are permissible, which are not any deviations. This is especially true in the second trimester. Once again, we emphasize that the table allows a normal error of four days in calculating the gestational age. After sixteen weeks, the CTE of the fetus is not measured.

It is important here not only to correctly set the deadlinepregnancy, but also to monitor the development of the child. In case of significant deviations from the norm, it is necessary to consult a doctor and only with it to decipher the results.

If we consider the KTP table by week, thenimmediately striking that after the eleventh week, the figures in it are almost doubling. So, if earlier КТР increased by 1 mm, then after the twelfth week it will grow by almost 2 mm (per day).

The most optimal is the measurement of CTF of the fetusat the eleventh week, as early diagnosis makes it possible to identify developmental defects in their early stages, this allows them to be eliminated and pregnant with a healthy pregnancy.

Consider how the KTR is determined

To determine the CTE, scan indifferent planes, while the greatest length of the embryo is determined by measuring from the cranial pole to the edge of the buttocks (the choledale sac and the limbs are not included here).

Thus, in the first trimester of pregnancywith the help of ultrasound, the diameter of the fetal egg and the coccygeal parietal size of the fetus is determined. These all measurements make it possible to accurately determine the duration of pregnancy, because in this period the size of the future baby is most closely approximated to the standards.

If we consider the table of measurement of the CTE of the fetus,it can be seen that it is seven millimeters for a period of six weeks, by the seventh week this figure grows to ten millimeters, at the beginning of the eighth week - sixteen millimeters, on the ninth - twenty-three millimeters, the tenth week is characterized by indicators of thirty-one millimeters, and the eleventh week - forty millimeters.

From the twelfth week of pregnancy, KTRembryo will grow at a slightly higher rate, this week they are equal to fifty two millimeters. The thirteenth week is characterized by a KTR of sixty-six millimeters.

Thus, the study of the CTE of the fetusan important role in the study of the course of a woman's pregnancy. Thanks to this indicator it is possible not only to determine the exact period of pregnancy, but also to reveal deviations in the development of the embryo at an early stage, which in turn increases the chances of their elimination and the production of a healthy child.

It should be noted that independentlydetermine the size of the fetus according to the results of ultrasound is not recommended, leave it to the experienced professionals, and then you will know about the real state of your future baby.