Q2 of 32 Page 204

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

• Ruptured Grafian follicles form the Corpus luteum.


• Corpus luteum produces progesterone and helps to maintain the endometrium lining, required for the implantation of embryo.


• However if fertilisation doesn’t happen then there is no need of endometrium lining.


• As in absence of fertilisation, endometerium is not required and the corpus luteum degenerates in 10-12 days.


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