Small biparietal diameter in infants may be related to a variety of factors such as maternal, fetal, placental, and umbilical cord.
1. Maternal factors:
(1) Nutritional factors: if a pregnant woman during pregnancy is often partial to food, has severe vomiting during pregnancy, and consumes insufficient protein and other nutrients, it is likely to affect the growth and development of the fetus, thus causing small biparietal diameter.
(2) Complications and comorbidities of pregnancy: If a pregnant woman suffers from complications such as hypertensive disorders of pregnancy, intrahepatic cholestasis of pregnancy, or comorbidities such as heart disease or high blood pressure during pregnancy, it may lead to a decrease in blood flow to the placenta, which affects the development of the fetus and leads to a small biparietal diameter.
(3) Others: If the pregnant woman’s age, weight, height, smoking, drug abuse, intrauterine infection and other conditions are abnormal during pregnancy, it is also likely to affect the development of the fetus, resulting in small biparietal diameter.
2. Fetal factors: If the fetus has genetic or chromosomal abnormalities, congenital developmental abnormalities, or a decrease in growth hormone in the umbilical cord blood, it is often accompanied by a small biparietal diameter.
3. Placental factor: If the placenta is diseased, it is likely to lead to insufficient blood supply to the fetus, affecting the development of the fetus, which in turn leads to small biparietal diameter.
4. Umbilical cord factor: If the umbilical cord is too long, knotted or tangled during pregnancy, it may also affect the development of the fetus, resulting in a small biparietal diameter.
As you can see, there are many reasons for small biparietal diameter of babies. Pregnant women should also pay close attention to the fetus during pregnancy to see if there are other abnormalities, and if there are any abnormalities, they should consult a doctor in time.