During pregnancy, expectant mothers will regularly go to the hospital for prenatal check ups. The doctor will measure the fetal biparietal diameter length (i.e. the widest distance between the left and right sides of the fetal head) through ultrasound examination, compare it with standard data, and use it as one of the criteria to determine whether the fetus is developing normally. Recently, a pregnant mother asked, is the biparietal diameter 93mm head large at 37 weeks?
Under normal circumstances, at 37 weeks of pregnancy, the fetal biparietal diameter should be within the range of 90mm (plus or minus 6.3mm), which means that any range between 83.7mm and 96.3mm is considered normal. Therefore, checking the fetal biparietal diameter at 37 weeks of pregnancy to be 93mm is normal. If it is found that the fetal biparietal diameter is greater or less than the standard value, it should be considered that the fetal development is abnormal and should be taken seriously.
If the fetal biparietal diameter is greater than the standard value, it may be a sign of fetal overgrowth. If it is only due to sufficient nutrition during pregnancy, there is no need to worry too much, as it is a common manifestation. However, to prevent the impact of macrosomia on production, pregnant mothers still need to control their weight appropriately. In addition, if the fetal biparietal diameter is too large, it may indicate that the fetus has hydrocephalus, and further examination should be done as soon as possible to rule out the possibility of developmental abnormalities.
If the fetal biparietal diameter is smaller than the standard value, it may also be related to nutritional status, such as the imbalance of nutritional intake during pregnancy, which leads to insufficient fetal weight development. At this time, the pregnant mother needs to strengthen the application and supplementation. At the same time, inaccurate gestational age or measurement errors in ultrasound can also affect the fetal biparietal diameter. In this case, as long as no obvious developmental abnormalities are found, the pregnant mother only needs to undergo regular prenatal check ups.
