1.

‘Parturition is induced by a complex Neuro endocrine mechanism’. Justify

Answer»
  • Parturition is a process where vigorous contraction of the uterus at the end of pregnancy causes expulsion/delivery of the foetus. 
  • The signals for parturition originate from the fully developed fetus and the placenta which induce mild uterine contractions called foetal ejection reflex.
  • This triggers release of oxytocin from the maternal pituitary. Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn stimulates further secretion of oxytocin. 
  • The stimulatory reflex between the uterine contraction and oxytocin secretion continues resulting in stronger and stronger contractions.
  • This leads to expulsion of the baby out of the uterus through the birth canal – parturition, after the infant is delivered; the placenta is also expelled out of the uterus.


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