Question

What is foetal ejection reflex? Explain how it leads to parturition?


NCERT Class XII
Biology - Main Course Book

Chapter 3. Human Reproduction

Answer 1

Foetal ejection reflex are the mild uterine contractions generated by placenta
when the foetus is fully developed , at the time of parturition.
Parturition is a neuro-endocrine mechanism, and is started by the signalsfrom the developed foetus and the placenta , which produce the foetal ejection reflex .This causes the releases of oxytocin from the pituitary , which causes stronger uterine contractions.This lead to the expulsion of baby along with the placenta

Answer 2

The signals causes parturition comes from the fully developed fetus and placenta by producing severe uterine contraction. These contractions are called feotal ejection contraction.

Parturition is a neuroendocrine mechanism which involves mother, fetus and placenta. Oxytoxin is the major hormone that plays a vital function in parturition and the placenta is the source of transporting neurohormones and peptides.