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Parturition is induced by a complex neur...

Parturition is induced by a complex neuroendocrine mechanism. Explain.

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Parturition is both under neural control and endocrine control. The signals for parturition originate from developed foetus and placenta which secrete C-RH (corticotropin-releasing hormone), this induces mild uterine contractions called as fortal ejection reflex. This triggers the release of oxytocin from maternal pituitary. Oxytocin acts on uterine muscles (myometrium) and causes stronger uterine contractions. This leads to the expulsion of baby out of uterus through birth canal called parturition
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Assertion (A): Parturition is induced by a complex neuro endocrine mechanism. Reason (R ): At the end of gestation period, the maternal pituitary releases prolactin which causes uterine contractions.

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(A) : The process of delivery of the foetus is called parturition. (R) : It is induced by a complex neuro-endocrine mechanism.

Read following statements (a-d) and choose the option with only correct statements. a. Parturition occurs due to a complex neuroendocrine mechanism at the end of gestation period. b. The signals for parturition originate from fully developed foetus and placenta which induces mild uterine contraction. c. Foetal ejection reflex triggers release of oxytocin from foetal pituitary. d. Oxytocin reduces uterine contraction under positive feedback control and causes expulsion of placenta followed by foetus known as parturition. a and b b and c c and d a and d

Parturition occurs

The neuroendocrine structure is