Generally, how many children do not exist in the stomach of a pregnant woman

Patient's question:

No

Doctor's answer:

Before 28 weeks, more than half of the fetuses are head-down. After 28 weeks, as the fetal head continues to grow, it will assume an inverted position in the amniotic fluid. If the fetal head has not engaged downward by 34 weeks, a chest-knee position should be adopted to correct the.