Question

Hormone causing vigorous contraction of myometrium to initiate parturition is ______.

Options

• hCG

• АСТH

• corticosteroids

• oxytocin

Answer 1

Hormone causing vigorous contraction of myometrium to initiate parturition is oxytocin.

Explanation:

Oxytocin is secreted by the posterior pituitary gland and acts directly on the smooth muscles of the uterus (myometrium). It triggers strong uterine contractions during labour, creating a positive feedback loop that leads to the birth of the baby (parturition).