What happens to corpus luteum in human female if the ovum is (i) fertilized, (ii) not fertilized?

OR

Write the difference between the tender coconut water and the thick, white kernel of a mature coconut and their ploidy.

If ovum is fertilized, the corpus luteum present in human female produces large amount of progesterone which helps in maintenance of endometrium.

If ovum is not fertilized, the corpus luteum presents in the human female degenerates thereby disintegration of endometrium takes place leading to menstruation.

OR

The coconut water is the part of the endosperm. It develops from primary endosperm nucleus as post-fertilisation structure.