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(C) Parturition is the process of giving birth to a child,which is induced by a complex neuroendocrine mechanism.The signal for parturition originates

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oxytocin

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(C) Parturition is the process of giving birth to a child,which is induced by a complex neuroendocrine mechanism.The signal for parturition originates from the fully developed fetus and the placenta,which induce mild uterine contractions called the Fetal Ejection Reflex.This reflex triggers the release of the hormone $Oxytocin$ from the maternal pituitary gland.$Oxytocin$ acts on the uterine muscle and causes stronger uterine contractions,which in turn stimulate further secretion of $Oxytocin$.This stimulatory reflex between the uterine contraction and $Oxytocin$ secretion continues,resulting in stronger and stronger contractions,leading to the expulsion of the baby out of the uterus through the birth canal.In clinical practice,synthetic $Oxytocin$ is often injected to induce or hasten labor (parturition) if natural contractions are insufficient.

Sometimes a pregnant woman is injected with . . . . . . hormone to hasten parturition.

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