NEET 2010 Biology question

Signals from fully developed foetus and placenta ultimately lead to parturition which requires the release of

(1)Relaxin from placenta
(2)Estrogen from placenta
(3)Oxytocin from maternal pituitaryCorrect
(4)Oxytocin from foetal pituitary

Answer: (3)

Solution

Parturition is a neuroendocrine process. Signals originating from the fully developed foetus and the placenta induce mild uterine contractions (the foetal ejection reflex), which trigger the release of oxytocin from the maternal posterior pituitary. Oxytocin acts on the uterine

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Question ID VK-090407