How to calculate the pregnancy weeks of IVF babies more accurately?
Test tube baby is a common way of assisted reproductive technology, which can help many infertile couples achieve their reproductive aspirations. In the whole process of IVF, accurate calculation of gestational age is crucial to the development of embryos and the health of pregnant women. This article will elaborate on how to calculate the pregnancy week of IVF more accurately from the aspects of ultrasound evaluation, determination of fertilization date, embryonic development and maternal signs.
Ultrasonic evaluation
Ultrasonic evaluation is a common method to determine the gestational age of test tube infants. Through ultrasonic technology, doctors can clearly observe the size and development of the embryo, so as to calculate the gestational week. After IVF embryo transfer, the first ultrasonic evaluation is usually performed 2-3 weeks after embryo implantation. The doctor will observe whether the embryo is successfully implanted into the uterine wall, and determine the gestational week according to the size and shape of the embryo. Thereafter, ultrasonic evaluation at regular intervals can more accurately calculate the gestational weeks of IVF infants.
In addition, ultrasound evaluation can also be used to determine the heartbeat of the embryo. Normal developing embryos usually have obvious heartbeat around 6-7 weeks of gestation. By detecting the heartbeat of the embryo, doctors can further confirm the gestational age and ensure the healthy development of the embryo.
Determination of fertilization date
Fertilization day is another important basis for the calculation of IVF pregnancy week. Fertilization date refers to the date when doctors combine sperm and egg during in vitro fertilization. According to the fertilization date and the last menstrual cycle of the pregnant woman, the gestational week can be calculated.
Generally speaking, blood tests can be carried out about 14 days after IVF embryo transfer to determine whether the pregnancy is successful. If the blood test results are positive, the pregnancy week is calculated from the date of fertilization. If the blood test result is negative, it may be that the transplantation fails or the pregnancy cannot be established, and further examination is required.
embryonic development
Embryo development is one of the important indicators in the calculation of IVF pregnancy weeks. According to the development of the embryo, the gestational week can be calculated accurately. After IVF, the embryo has gone through different stages of development, such as two cell stage, four cell stage, six cell stage, etc.
Doctors can infer the gestational age of an embryo by observing its shape and development. Generally speaking, the more cells of the embryo divide, the larger the size of the embryo, and the higher the gestational age. The pregnancy weeks of IVF can be calculated more accurately by combining the development of embryos with the results of ultrasonic evaluation.
Physical signs of pregnant women
The pregnant woman's physical signs are also one of the important reference bases for determining the pregnancy week of test tube babies. Pregnant women may have some special signs in early pregnancy, such as breast pain, nausea and vomiting. By observing the changes of pregnant women's physical signs, the gestational week can be preliminarily predicted.
However, it should be noted that the changes of pregnant women's physical signs vary from person to person, and the pregnant week cannot be accurately calculated by the physical signs of pregnant women alone. Therefore, pregnant women's physical signs can only be used as a reference to determine the accuracy of IVF pregnancy weeks in combination with other indicators.
Summary
In the process of IVF, accurate calculation of gestational age is crucial to the development of embryos and the health of pregnant women. The pregnancy week of IVF can be calculated more accurately through comprehensive consideration of ultrasound evaluation, determination of fertilization date, embryo development and pregnant women's physical signs. It is suggested that during the whole IVF process, couples should keep close communication with professional doctors to keep abreast of the pregnancy week in time to ensure a healthy pregnancy and childbirth.
