Question

What is parturition ? which hormones plays key role in induction of parturition?


class 12th CBSE Biology sample paper

Answer 1

Parturition is the process of delivery of fetus (childbirth).
The signals for parturition originate from the fully developed fetus and the placenta, which triggers release of Oxytocin from the maternal pituitary.
Oxytocin acts on the uterine muscles and cause stronger uterine contraction, which is turn stimulates further secretion of oxytocin.
Relaxin hormone from ovary widens the vagina to facilate birth.

Answer 2

Answer:

Parturution is the process wherein a fully developed foetus, from the mother’s womb, is expelled out after the completion of the gestation period.

There are two critical hormones that are involved in the induction of parturition, they are:

• Oxytocin – It directs the full-term foetus towards the birth canal, as it causes the contraction of the smooth muscles of the myometrium of the uterus leading the baby to be expelled out

• Relaxin – It relaxes the pelvic ligaments, widening the pelvis to assist in an easier childbirth