Usually the normal range of fetal biparietal diameter at 19 weeks of pregnancy is 3.99-5.05cm.
Biparietal diameter, abbreviated as BPD, is the distance between the widest right and left sides of the fetal head. It is an indicator used to determine the development of the fetus in the clinic and is usually monitored at around 16 weeks of pregnancy.
At 19 weeks of pregnancy, the BPD is usually 3.99-5.05 cm. If the BPD is large, it may be due to fetal hydrocephalus or diabetes mellitus. If the biparietal diameter is small, it may be due to poor fetal development; if it is slightly out of the normal range, pregnant women can consume more protein-containing foods, such as eggs, fish, and so on.
Pregnant women should pay attention to the abnormality of fetal biparietal diameter, if it is too large or too small, they should go to the hospital in time to clarify the cause, and be treated under the guidance of the doctor.