alleryThe hormone primarily responsible for stronger uterine contractions during parturition is:
AProlactin
BProgesterone
CRelaxin
DOxytocin
Answer & Solution
Correct answer: D. Oxytocin
**Oxytocin** (from maternal posterior pituitary) acts on uterine muscle to cause stronger contractions, and the resulting contraction further stimulates oxytocin release — a positive-feedback loop driving parturition.
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