Ncert Exercises & Solutions

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

The ruptured Graafian follicle transform into the corpus luteum and secretes large amounts of progesterone which is essential for the maintenance of the endometrium. Such an endometrium is required for the implantation of fertilised ovum (blastocyst) and other events of pregnancy.

That's why corpus luteum in pregnancy has a long life. But in the absence of fertilisation, maintenance of enclometrium is not required. Therefore, corpus lufotim clegenerates with in 10-12 days.

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