How can a woman know her child's blood type when she is pregnant?

Introduction; A baby's blood type is usually determined by genes. In order to determine the blood type of a baby, some blood tests are usually carried out after birth. If there are special circumstances during pregnancy and parents need to know, they can also know the child's blood type. So how do we know? We can get to know each other together.

First, how to check the blood type of the fetus during pregnancy If you want to know the blood type of the fetus during pregnancy, you can check the blood type of the fetus through some amniocentesis or cord blood testing. In this way, we can know whether the blood type of the fetus is consistent with that of the parents as soon as possible, find out whether there is hemolytic disease in time, and diagnose and treat it early. Then the newborn can also recover as soon as possible. Does not affect the growth and development of children.

Second, amniocentesis is the most common invasive prenatal diagnosis technique. Doctors can obtain fetal skin, gastrointestinal tract, urinary tract and other free cells by extracting amniotic fluid, and use these free cells to further analyze whether the fetal chromosome is abnormal. This kind of operation is usually performed around 16~22 weeks, because the proportion of living cells in amniotic fluid is relatively high at this time. Amniotic fluid wool puncture, you only need to extract about 5~8 ml of amniotic fluid, which will not cause the uterus to actually become smaller and miscarry. Moreover, amniotic fluid cells can be used for the diagnosis of metabolic diseases, gene diagnosis and so on.

Third, cord blood detection fetal blood type cord blood puncture is one of the important prenatal examinations. Puncture plays an irreplaceable role in diagnosing the development and health of the fetus in the abdomen. Chromosome examination of umbilical cord puncture and amniotic fluid puncture can check whether there is any abnormality of umbilical cord puncture in fetal spine, and the puncture site should be determined according to the position of placenta. Then the free part of amniotic fluid can be punctured or the fetal umbilical cord root and placental root can be punctured. Predict or determine the blood type of the fetus.