How to accurately calculate the pregnancy period of IVF?
The development of IVF technology enables couples who cannot conceive naturally to realize their dreams of childbirth. The accurate calculation of IVF pregnancy period is very important for women's health and fetal growth. The following will explain in detail how to accurately calculate the pregnancy period of IVF from four aspects: ultrasonic examination, embryo transfer date, the development of fertilized eggs and the sense of the pregnant woman.
1. Ultrasonic inspection
Ultrasonic examination is a common method to evaluate the development of embryos and calculate the pregnancy period. In the process of IVF, the calculation of pregnancy is mainly based on the development of embryos. The first ultrasonic examination is usually carried out 14-20 days after embryo transfer. The doctor will observe the shape and size of the embryo to determine whether it is successfully implanted. If the implantation is successful, the doctor can measure the size of the embryo and calculate the gestational weeks based on the development speed of the normal embryo. Generally speaking, the growth rate of the embryo is 1-2 mm per day, so the accurate pregnancy period can be calculated.
In the late pregnancy, the doctor will conduct multiple ultrasonic examinations to assess the growth and health of the fetus. By measuring the fetal head circumference, abdominal circumference and femur length, doctors can infer the accurate pregnancy period and judge whether the fetal growth is normal. Therefore, ultrasonic examination is an important means to accurately calculate the pregnancy period of test tube babies.
2. Date of embryo transfer
The date of embryo transfer is also an important reference information for calculating the pregnancy period of test tube babies. Embryo transfer is one of the key steps in IVF pregnancy. After embryo transfer, it is generally necessary to wait about 10 days for a blood progesterone test. Progesterone is a pregnancy hormone. Checking its concentration can determine whether the embryo is successfully implanted. If progesterone levels rise and remain elevated for a period of time, it can be determined that a pregnant woman is pregnant. At this point, the pregnancy period can be calculated from the date of embryo transfer.
The date of embryo transfer can be determined by the IVF cycle. Generally speaking, the distance between embryo transfer date and egg retrieval date is 3-5 days. Therefore, the pregnancy period of IVF can be determined by accurately recording the date of egg retrieval and the date of embryo transfer.
3. Development of fertilized eggs
The development of fertilized eggs can also provide key reference information to calculate the pregnancy period of IVF. The fertilized eggs of IVF babies need to be cultured in the laboratory before embryo transfer. Doctors will observe the development of the fertilized eggs to determine the best time for embryo transfer.
The fertilized eggs are usually transferred on the second to fifth days after fertilization. If the fertilized egg develops slowly in the laboratory, doctors may choose to extend the embryo culture time to improve the quality of embryo development. At this time, the pregnancy period of IVF can be calculated by referring to the days of culture of fertilized eggs.
4. Pregnant women's own feelings
The feelings and experience of pregnant women are also important references for calculating the pregnancy period of IVF babies. In the process of IVF, pregnant women may have some special physical feelings, such as breast pain, nausea and vomiting, frequency of urination, etc. The appearance of these symptoms is often related to pregnancy, and gradually worsens with the increase of pregnancy.
Pregnant women can preliminarily infer their pregnancy period by recording their own physical feelings and symptoms. However, the accuracy of pregnant women's own feelings is relatively low, especially in the early stage. Therefore, only by combining other medical examinations and consulting doctors' opinions can accurate pregnancy calculation results be obtained.
Summary
It is very important for the health of mothers and babies to accurately calculate the pregnancy period of test tube babies. The pregnancy period of IVF can be calculated relatively accurately through ultrasonic examination, embryo transfer date, the development of fertilized eggs and the feelings of pregnant women themselves. However, it is worth noting that everyone's situation is different, and the most accurate calculation depends on the professional guidance and evaluation of doctors.
