Umbilical blood flow refers to the data obtained by measuring the fastest contraction speed of the umbilical artery and the slowest blood flow speed during expansion, and comparing other relevant indicators to reflect blood flow, which can roughly determine the fetal development status. So, how many times should this type of umbilical cord blood flow be done in late pregnancy?
The best time for umbilical blood flow examination is after 28 weeks of pregnancy, as 28 weeks means entering the late stage of pregnancy. It is obvious that umbilical blood flow testing is best done in the late stages of pregnancy. In late pregnancy, it is generally sufficient to undergo a fetal umbilical blood flow test once a week.
After this examination of umbilical blood flow, more detailed information about the fetus can be determined. For example, it is possible to determine whether the fetus is experiencing intrauterine growth retardation, assess whether the pregnant woman has gestational hypertension syndrome, and determine whether there is a risk of fetal intrauterine hypoxia.
In addition, if some fetuses have chromosomal abnormalities, they can sometimes be detected in a timely manner during umbilical cord blood flow. However, in addition to pathological problems that can lead to abnormal umbilical blood flow, it may also be related to the placenta and histology.
The normal value obtained from umbilical blood flow varies depending on the number of weeks of pregnancy. There are three main data items detected, and the S/D value is actually the main indicator. Generally, a S/D value of less than or equal to 3.0 is required to determine that both the pregnant woman and the fetus are in a normal state.
