In females, ovaries release ovum or egg once every 28 days from the age of puberty. The uterus prepares itself every month to receive a fertilized egg.
Thus, its lining becomes thick and spongy. If the egg is not fertilized it lives for about a day. Afterwards this lining of the uterus is no longer required and Menstruation Occurs.
Also Check – Describe the Menstrual Cycle
Menstruation is the phase of uterine bleeding in which an unfertilised egg and the thick uterine lining.
It occurs through the vagina as blood and mucus. Menstruation lasts for about 3-5 days.
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