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How to calculate pregnancy weeks after IVF pregnancy?

How to calculate pregnancy weeks after IVF pregnancy?



How to calculate gestational weeks after IVF pregnancy

IVF is an embryo cultivated in the laboratory through assisted reproductive technology, and then implanted into the mother's uterus for pregnancy. For IVF pregnant women, it is very important to accurately calculate the gestational age, which can help them better understand the development of the fetus. The following will elaborate on how to calculate the gestational week after IVF pregnancy from aspects such as ultrasound examination, the last menstrual period, embryo transfer and pregnant women's conscious symptoms.

Ultrasonic examination

Ultrasonography is one of the main methods to accurately calculate the gestational age of test tube infants. In the early stage of IVF pregnancy, the gestational sac and fetus develop relatively fast. At this time, the size and shape of the gestational sac can be observed through ultrasound, so as to calculate the gestational week. Generally speaking, ultrasonic examination can be performed about 2 weeks after the appearance of the gestational sac. At this time, the diameter of the gestational sac is 2-5mm. After that, ultrasonic examination shall be carried out every 1-2 weeks to observe the development of the embryo and calculate the gestational week according to the size and shape of the embryo.

Last menstruation

For IVF pregnant women, the gestational week is usually initially estimated according to the time of the last menstruation. The first day of the last menstrual period is regarded as the first day of pregnancy, and then according to the ovulation period of about 2 weeks before pregnancy, combined with the appropriate fertility window, the age of the embryo can be preliminarily calculated. However, because IVF is often carried out with artificial assistance, the real pregnancy time of pregnant women may not be completely consistent with the last menstrual period. Therefore, the last menstruation is only a reference for the preliminary calculation of pregnancy week, not the only basis for accurate calculation of pregnancy week.

embryo transfer

The gestational week of IVF can be calculated by determining the date of embryo transfer. In IVF assisted reproductive technology, embryos are generally cultivated in the culture center to the appropriate development stage, and then implanted into the uterus of pregnant women through embryo transfer. The date of embryo transfer is regarded as the start time of pregnancy, and the gestational week can be calculated according to this date. For example, blood HCG (human chorionic gonadotropin) can be detected on the 7th day after embryo transfer, and pregnancy can be judged by the test results; If the HCG value exceeds a certain threshold, the pregnancy can be confirmed and the gestational week can be calculated.

Pregnant women's conscious symptoms

Pregnant women often have some conscious symptoms in the early stage of pregnancy, such as breast pain, nausea and vomiting, which can help them initially judge their pregnancy week. Breast distention and pain mostly occur between 4-6 weeks of pregnancy, while nausea and vomiting mostly occur between 6-10 weeks of pregnancy. By knowing their own symptoms, pregnant women can communicate with doctors to calculate their gestational weeks more accurately. It is very important to calculate the gestational age of IVF, which can provide accurate prediction of fetal development and corresponding medical guidance. Whether it is through ultrasound, the last menstrual period, embryo transfer or pregnant women's conscious symptoms, it can help pregnant women accurately calculate the gestational week. Through close cooperation with doctors, pregnant women can better understand the growth of their babies, and make corresponding preparations and nursing work.
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