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What is the calculation method of the test tube baby's due date?

What is the calculation method of the test tube baby's due date?



Calculation method of test tube baby's due date

The calculation of the expected date of IVF is a very important work in assisted reproductive technology, which can help doctors and families make better arrangements and preparations. The following will elaborate on the calculation method of IVF's due date from four aspects: pregnancy age calculation, embryo maturity calculation, progesterone level monitoring and ultrasound examination.

Calculation of gestational age

Gestational age is the number of pregnancy cycles calculated from the date of fertilization or embryo transfer, which is the basis for calculating the expected birth date of IVF. For naturally pregnant women, the gestational age is generally calculated by the first day of the last menstrual period. But for IVF, the pregnancy age can be accurately calculated by the date of egg collection or embryo transfer. First, for egg collection, the egg is combined with sperm and cultured, and then the embryo is transferred back to the endometrium. At this time, the pregnancy age is calculated from the date of egg collection or embryo transfer, which is generally 14 days. The pregnancy age calculated in this way is consistent with the real pregnancy time.

Calculation of embryo maturity

Embryo maturity is another important indicator for the calculation of the expected delivery date of IVF. The morphological characteristics of the fertilized egg can be used to judge its development maturity, which can be assessed by referring to the guidelines of the American Society of Reproductive Medicine (ASRM) and the European Society for Test Tube Infants (ESHRE). Doctors can divide the embryo into different stages of development according to the shape of the egg, the number of embryonic cells and the performance of the endoplasmic reticulum. The common ones include dicotyledon stage, chimera stage, coelomate stage and blastocyst stage. The evaluation of embryo maturity can help doctors predict the expected date of IVF more accurately.

Monitoring of progesterone level

Progesterone is an important pregnancy hormone, which plays a role in maintaining embryonic growth and endometrial stability after pregnancy. The monitoring of progesterone level is another key link in the calculation of the expected delivery date of test tube infants. By continuously monitoring the change of progesterone level in pregnant women, doctors can understand the situation of embryonic development and whether the pregnancy is normal. Generally speaking, when the progesterone level is high, the embryo develops well, while when the progesterone level is low, the embryo may stop developing. By constantly adjusting the dose of progesterone supplements, doctors can more accurately predict the expected date of delivery of test tube babies.

Ultrasonic examination

Ultrasonography is one of the most direct and accurate methods to calculate the expected delivery date of test tube babies. Ultrasound imaging technology can be used to observe and evaluate the embryos in the uterus of pregnant women. Doctors can judge the maturity and due date of the embryo by measuring the length of the head and buttocks, the diameter of the cranial calices, and the length of the humerus. In addition, ultrasound can also observe placental conditions, amniotic fluid volume, endometrial thickness and other indicators to further evaluate the growth and development of test tube babies. To sum up, the calculation methods of IVF's due date mainly include the calculation of gestational age, embryo maturity, progesterone level monitoring and ultrasound examination. Through the comprehensive application of these methods, doctors can more accurately predict the expected delivery date of IVF, and provide better medical guidance and nursing services for patients. In this process, accurate calculation of gestational age is the basis. The assessment of embryo maturity can provide reference indicators for embryonic development, while the monitoring of progesterone level and ultrasound can directly assess the growth of test tube babies. Combining these methods can help doctors predict the expected date of IVF more accurately and provide better reference for family life and work arrangements. Therefore, it is of great significance for families to reasonably use these calculation methods to accurately predict the expected delivery date of IVF.
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