Question

When does menstruation occurs in females?

Answer 1

As far as humans are concerned a period is a bleed from the womb (uterus) that is released through the vagina. Women have a period every 28 days approximately. However, some women may have a 24-day cycle while other may have a 35-day one. A period is part of the woman's menstrual cycle

hope this helps!

Answer 2

Answer: When the egg is not fertilized.

Step-by-step explanation:

Menstruation can be defined as the biological phenomenon in which the inner lining of uterus sheds along with mucosal tissue and blood.

It starts at the age of puberty and ends at the age between 45 to 50. When the body prepares uterus for pregnancy it releases eggs from ovary and thickens the uterus for implantation.

But when the eggs are not fertilized, then it is shed off from the uterus known as menstruation which lasts from 2-7 days every month.