A head circumference of 334mm and an abdominal circumference of 335mm at 40 weeks of pregnancy is the normal size of a fetus. Whether or not a labor can be normalized needs to be combined with the position of the fetus, whether or not the pregnant woman has any comorbidities or complications during pregnancy as well as the size of the pregnant woman’s pelvis.
If the pregnant woman’s pelvis is the right size, there are no other complications in pregnancy, the fetal position is normal, the contractions and amniotic fluid are normal, the cervical opening shortens and dilates smoothly, and the fetal heart is normal during labor, it is generally possible to have a normal delivery.
If the woman’s pelvis is too small, or if she has serious pregnancy complications such as heart disease, or if the fetus is in a transverse position, or if the fetal heart is abnormal during labor, or if the labor is not progressing smoothly, she may not be able to have a normal delivery, and a cesarean section is needed to terminate the pregnancy.
The mode of delivery of a pregnant woman needs to be evaluated by a specialized obstetrician and is not based on a single indicator.