NEET BIOLOGY

Detailed explanation-1: -The signals for parturition originates from a fully developed foetus and placenta which induce mild uterine contraction. This triggers the release of oxytocin (birth hormone) from the maternal pituitary gland.

Detailed explanation-2: -When foetus become fully developed then the signals originate from placenta and foetus which induce the uterine wall contraction. Uterine contractions give the signals to the maternal pituitary gland to release the oxytocin hormone. Oxytocin induces the uterine contractions vigorously so, the foetus is pushed outside.

Detailed explanation-3: -The signals for parturition originates from the fully developed foetus and followed by placenta causing the mild contractions called: Q.

Detailed explanation-4: -Parturition is the act of giving birth to the young; childbirth. Fully developed foetus and placenta send signals for parturition which in turn induces mild uterine contractions by stretching of cervix referred to as foetal ejection reflex.