How to determine the expected date of delivery after IVF pregnancy
IVF is a process of fertilization in the laboratory and transplantation into the mother through assisted reproductive technology. After IVF pregnancy, it is very important for pregnant women and doctors to determine the expected date of delivery. This article will elaborate on the determination of the expectant date of IVF pregnancy from four aspects: pregnant women's physical signs, ultrasound examination, pregnancy period and special circumstances.
Physical signs of pregnant women
Pregnant women's physical signs are one of the most commonly used methods to predict the expected delivery date of IVF. After pregnancy, women will have a series of signs changes, including cessation of menstruation, breast pain and nipple darkening. In addition, many women will experience nausea, vomiting, fatigue and frequent urination at the beginning of pregnancy. According to these physical signs, doctors can preliminarily estimate the range of the expected date of birth, usually around 40 weeks.
However, the physical signs of pregnant women can only provide a general prediction range, and can not accurately determine the expected date of delivery. Therefore, doctors usually combine other methods to determine the expected date of delivery of IVF more accurately.
Ultrasonic examination
Ultrasonography is a commonly used method to determine the expected delivery date of test tube babies. Ultrasonic technology can be used to observe the development of the fetus in the uterus, and measure the length of head and hip, head circumference, abdominal circumference and other parameters. According to the size and development of the fetus, doctors can accurately determine the expected date of birth.
In the early pregnancy of IVF, ultrasound can more accurately determine the age and expected date of the embryo. However, in the third trimester, the fetal growth rate will be different, and the accuracy of ultrasound may have some errors. Therefore, pregnant women usually need multiple ultrasound examinations to determine the final due date.
During pregnancy
The pregnancy period of IVF can also help determine the expected date of delivery. The pregnancy period is generally divided into three metaphase pregnancy, namely, prophase pregnancy (1-12 weeks), metaphase pregnancy (13-27 weeks) and anaphase pregnancy (28 weeks to delivery).
In the first trimester, the menstrual cycle of pregnant women will stop and begin to change in all aspects of the body. In the second trimester, the fetus begins to grow rapidly, and the pregnant woman may feel the fetal movement, and the belly gradually becomes larger. In the late pregnancy, the head of the fetus will drop to the pelvis, and the pregnant woman may feel that the pelvic pressure increases and the frequency of urination increases.
By monitoring the changes of pregnant women during pregnancy, doctors can combine the above methods to more accurately determine the expected date of IVF.
exceptional case
In some cases, the expected date of IVF may not be determined accurately. For example, if a pregnant woman has multiple pregnancies, or an abnormal situation occurs after embryo transfer, such as blastocyst implantation failure or abortion, the determination of the expected date of birth may be more complicated.
In these special cases, doctors will make corresponding prenatal plans according to individual conditions. They may conduct more frequent ultrasound examinations, monitor hormone levels and embryonic development to more accurately determine the expected date of delivery of IVF.
To sum up, it is a key task to determine the expected date of delivery after IVF pregnancy. The physical signs of pregnant women, ultrasonic examination, pregnancy period and special conditions are the important basis for determining the expected date of delivery. Doctors will combine various methods to determine the most accurate expected date of delivery, so as to provide the best prenatal care for pregnant women.
