Question

Which of the following hormones initiate parturition?

• A. ACTH, hCG, oxytocin
• B. ACTH, corticosteroid, oxytocin
• C. Corticosteroid, ACTH, prostaglandin
• D. ACTH, progesterone, hCG

Answer 1

Answer: (B)

ACTH, corticosteroid, oxytocin

Parturition is the process in which a mother gives birth to its young one. It initiates when the message initiating parturition starts with the fetal brain, its control of ACTH release from the pituitary, and increased cortisol production by the fetal adrenal. The cortisol stimulates placental enzymes which cause placental progesterone to be made into estrogen. Oxytocin leads to the contraction of smooth muscles of myometrium of the uterus, which directs the full term foetus towards the birth canal.

So the correct option is 'ACTH, corticosteroid, oxytocin'.