Human Reproduction Question 69
69. The foetal ejection reflex in humans triggers release of
[NEET Kar. 2013]
(a) Oxytocin from maternal pituitary
(b) Oxytocin from foetal pituitary
(c) Human Chorionic Gonadotropin (hCG) from placenta
(d) Human Placental Lactogen (hPL) from placenta
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Answer : a
Hints & Solutions
(a) Parturition is induced by a complex neuroendocrine mechanism. The signals for parturition originate from the fully developed foetus and the placenta which induce mild uterine contractions called foetal ejection reflex. This triggers release of oxytocin from the maternal pituitary.
