Calculation of the expected date of birth of test tube babies
In vitro fertilization (IVF) or in vivo fertilization is used to breed IVF in the laboratory, and then the fertilized eggs are implanted into the mother's uterus until the pregnancy is completed. Compared with natural pregnancy, it is more complicated to calculate the expected delivery date of IVF. The accurate prediction of the expected date of birth is very important for the puerpera and the medical team, so the hospital will take some methods to calculate the expected date of the test tube baby. The following is a detailed description of the calculation of the expected delivery date of IVF from four aspects: ultrasonic examination, date of blastocyst transfer, development of fertilized eggs and duration of pregnancy.
Ultrasonic inspection
Ultrasonic examination is a common method to calculate the expected date of delivery of test tube babies. By observing and measuring the development of the fetus with ultrasonic instruments, doctors can predict the age and expected date of birth of the fetus. About two weeks after IVF egg transfer, the doctor will conduct the first ultrasonic examination to determine the continuity of pregnancy by measuring the size of the fetal sac and the heartbeat of the fetus. After that, the doctor will carry out ultrasonic examination regularly, and calculate the expected date of delivery according to parameters such as the size of the fetal sac and fetus. Ultrasonic examination is a more accurate method, but it needs to be combined with other factors for comprehensive evaluation.
In addition, ultrasonic examination can also help doctors to observe the growth and development of the fetus, find any abnormalities in time, and take corresponding measures.
Date of blastocyst transfer
The date of blastocyst transfer is also an important reference for calculating the expected delivery date of test tube babies. In the process of IVF of IVF, the fertilized egg undergoes a series of cultivation stages and forms a blastocyst. Blastocyst transfer is usually carried out on the third to fifth days of cultivation. According to the date of blastocyst transfer, the expected date of delivery can be calculated. In general, 14 days after blastocyst transfer, human chorionic gonadotropin (hCG) in the urine or blood of pregnant women can be measured to determine whether the pregnancy is successful. Transplantation date and hCG test results can help doctors calculate the range of expected delivery date.
Development of fertilized eggs
The development of fertilized eggs is also one of the important factors to calculate the expected date of IVF. The development speed and quality of the fertilized eggs have a certain influence on the calculation of the expected delivery date. During in vitro fertilization, the development of fertilized eggs will be closely monitored by doctors. Generally speaking, if the development of the fertilized egg is smooth and the embryo quality is good, the expected date of delivery may be earlier. If the development is relatively slow and the embryo quality is poor, the expected date of delivery may be later.
Duration of pregnancy
The duration of pregnancy also plays an important role in estimating the expected delivery date of IVF. According to the standard duration of normal pregnancy, the possible range of expected date of delivery can be preliminarily determined. However, the duration of IVF pregnancy may be affected by different factors, such as the rate of embryo development, female age, etc. Therefore, the accurate prediction of the expected date needs to be combined with other factors for comprehensive consideration.
To sum up, the calculation of the expected date of delivery of IVF is a complex and limited process. Ultrasonic examination, the date of blastocyst transfer, the development of fertilized eggs and the duration of pregnancy are all involved. The medical team will make a comprehensive assessment based on these factors to help the pregnant women and their families plan and arrange the expected delivery date.
