How many tests can test tube babies?
With the development of IVF technology, many infertile couples have realized their desire to become parents. In the process of IVF, testing is an indispensable link, which can provide doctors and couples with information about the health and development of embryos. How many times can test tube babies be tested? The following will elaborate on the detection of IVF from four aspects: gene detection before embryo transfer, gynecological examination in early pregnancy, Down's syndrome screening in mid pregnancy, and fetal growth monitoring.
Gene detection before embryo transfer
In the process of embryo culture at the early stage of IVF, doctors can conduct gene testing on the embryo. This test is called PGS (Preimplantation Genetic Screening) of IVF, which can detect whether there is gene mutation of some genetic diseases in the embryo. PGS determines whether the embryo is healthy by screening the chromosome number and structure of the embryo, so as to improve the success rate of transplantation.
Common genetic diseases requiring gene testing include Down's syndrome, Edwards syndrome, mental retardation, etc. Among embryos with abnormal chromosomes, there is often a high abortion rate. Therefore, screening embryos with abnormal genes can reduce the number of failed transplants and improve the success rate of IVF.
In some professional IVF hospitals, PGS testing can be performed many times to select healthier embryos for transplantation. However, each time PGS is performed, some cells of the embryo are consumed, so the doctor will determine whether multiple tests are required according to the specific situation and the wishes of the couple.
Gynecological examination in early pregnancy
After the success of IVF transplantation, women entered the pregnancy period. In early pregnancy, doctors usually carry out a series of gynecological examinations. First, regular blood and urine tests were conducted to assess women's overall health. Blood tests can detect women's blood type, HIV and syphilis infections, and urine tests can assess women's renal function and urinary tract infections.
In addition, the doctor will also perform uterine ultrasound to determine whether the embryo is embedded in the uterus, and evaluate the development of the embryo. Ultrasonography can detect the heartbeat of the embryo, the size of the embryo sac, the location of the placenta and the thickness of the endometrium.
According to women's physical conditions and doctors' suggestions, gynecological examinations can be carried out many times in early pregnancy to ensure the health of women and embryos.
Down syndrome screening in the second trimester
In the second trimester, doctors usually screen women with test tube babies for Down syndrome. Down syndrome is a common chromosomal genetic disease, which is often accompanied by mental retardation and physical deformity. The risk of Down syndrome in the fetus can be assessed through Down syndrome screening.
Down syndrome screening can be carried out through serological indicators in maternal blood and ultrasonic examination. Serological indicators include maternal serum free β Concentration of human chorionic gonadotropin and P-A. Ultrasonography can detect the neck thickness of the fetus, and comprehensively assess the risk of Down syndrome combined with indicators in maternal blood.
In general, it is a common practice to conduct a screening for Down syndrome in the second trimester of pregnancy. However, under special circumstances, such as elderly pregnant women or pregnant women with family genetic history, doctors may recommend multiple screening.
Monitoring of fetal growth
In the late pregnancy of IVF women, doctors usually regularly monitor the growth of the fetus. This can be done by performing fetal ultrasound. Ultrasonography can observe the size, head circumference, abdominal circumference, limb length and fetal activity of the fetus, and evaluate the growth of the fetus.
Through multiple fetal ultrasound examinations, doctors can find out the abnormal fetal development in time and take appropriate intervention measures. The common fetal growth monitoring includes regular prenatal examination and prenatal ultrasound examination to ensure the health and development of the fetus.
Summary
The number of tests that IVF can perform is related to the different stages of IVF and the specific tests that need to be performed. From gene testing before embryo transfer, to gynecological examination in early pregnancy, to Down's syndrome screening and fetal growth monitoring in the second trimester, corresponding tests are needed to assess the health of women and fetuses. In some cases, doctors may recommend multiple tests to ensure the success rate of IVF and the healthy development of the fetus.
