Delivery is divided into several processes

Patient's question:

The process of childbirth

Doctor's answer:

Hello:
The human childbirth process is typically divided into three stages. In the first stage, the frequency of uterine contractions is low, and the contractions are weak. Their main role is to further dilate the cervix. By the end of this stage, the amniotic sac outside the fetus ruptures, and the amniotic fluid is expelled. When the cervix is fully dilated and the fetal head has descended into the pelvic cavity, the second stage begins. From then on, uterine contractions become faster and stronger, which is known as labor contractions. The role of contractions is to push the fetus out. When contractions occur, the mother should coordinate by holding her breath, closing her glottis, and contracting both the abdominal muscles and the diaphragm. This will help with delivery.
Typically, these contractions occur intermittently two or three times, after which the uterus continues to contract strongly for 20–30 minutes—this is the third stage. The contractions during this stage expel the placenta and compress the venous sinuses and damaged blood vessels of the uterine wall to prevent excessive bleeding. After the delivery process is complete, the uterus gradually shrinks but cannot return to its pre-pregnancy state.