Question

Which of the follwoing hormones initiate the parturition?

• A. ACTH, HCG Oxytocin
• B. ACTH, Corticosteriod, Oxytocin
• C. Corticosteroid, ACTH, Prostaglandin
• D. ACTH, Progesteron, HCG

Answer 1

Answer: (B)

ACTH, Corticosteriod, Oxytocin

The process of giving birth to a baby is called parturition. It starts with the rise in oestrogen/progesterone ratio, increase in the level of oxytocin secretion by both, mother and foetus. Progesterone is called pregnancy hormone. Parturition is induced by a complex neuroendocrine mechanism. The signals for parturition originate from the fully developed foetus and the placenta, which induces mild uterine contractions called foetal ejection reflex. This reflex triggers the release of oxytocin from the maternal pituitary. This hormone acts on uterine muscles and causes more contractions, which in turn secrete more oxytocin. Some other hormones are also secreted by placenta which are involved in initiating parturition, such as ACTH, corticosteroids, glucocorticoids, HCG etc.

So, the correct answer is 'ACTH, Corticosteriod, Oxytocin'.