EMBRYOLOGY
FEMALE SEX GLAND OVARIES ÖOGENESIS AND MENSTRUAL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Strong muscular contractions push the baby out.
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The fetus develops a heartbeat.
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The umbilical cord is tied and cut.
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Strong muscular contractions of the uterus cause the cervix to enlarge.
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Detailed explanation-1: -During natural labor, uterine contractions increase in intensity and force the fetus into the birth canal. Stretch of the cervix causes the reflex release of additional oxytocin from the posterior pituitary, further increasing the strength of uterine contractions in a positive feedback cycle.
Detailed explanation-2: -Strong uterine contractions compress uterine blood vessels, preventing a continuous hemorrhage at childbirth.
Detailed explanation-3: -Contraction of the cervical smooth muscles helps the cervix to remain firm and closed during early pregnancy, while relaxation of the cervical smooth muscles help facilitate cervical dilatation during labor.
Detailed explanation-4: -During childbirth, the muscles at the top of your uterus contract and push your baby towards your cervix. If your baby is facing head-down, the head will press on your cervix. This, along with the release of the hormone oxytocin (see ‘How hormones help you give birth’, below), brings on contractions.