Productivity

The force that the fetus and its pregnancy appendages push out from the uterus is called productive force, which is the force of uterine contraction (uterine contraction) that we often talk about. Strength), and the contractile force of the levator ani muscle, these three forces together form the productive force. Among them, the uterine contraction force plays a major role. It can expand the cervix and open the mouth to force the fetus to decline. The contraction force of the abdominal muscles and levator muscle can assist the uterine contraction to exclude the fetus and its appendages from the body.

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