Question

Why does menstruation occur?
Answer fast.

Answer 1

Question

Why does mensuration occurs?

Answer

menstruation occurs in human females only when the egg is not fertilized by the male sperm.Since the egg is not fertilized so thick and soft uterus lining have a lot of blood capillaries in it is not required.Thus, the unfertilized ovum disintegrates within a day and the uterus lining also the breaks down .As the uterus lining contains a lot of blood vessels so when it is shed blood along with other issues is released.

This comes out of the vagina in form of bleeding.

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Answer 2

Menstruation occurs when the egg is not

fertilised. Every month, uterus prepares itself to receive a fertilised egg. To nourish the embryo, it's lining becomes thick and spongy. In case, egg is not fertilised, this lining breaks and discharges out of the body through the vagina in the form of blood. This is referred to as menstruation.