Question

Corpus luteum in pregnancy has a long life. However, if fertilisation does not take place, it remains active only for 10-12 days. Explain.

Answer 1

Definition of Corpus luteum:

During ovulation the Graffian follicle ruptures and releases the secondary oocyte. The remaining cells of the Graffian follicle form the corpus luteum.


In case of fertilization:

When fertilization takes place corpus luteum acts as a temporary endocrine gland and produces progesterone, which helps to prepare the endometrium for implantation. So corpus luteum is maintained throughout the pregnancy.


In case of absence of fertilization:

In case of absence of fertilization corpus luteum degenerates to white body, as the maintenance of endometrium is not required. This causes the disintegration of endometrium leading to menstruation.