When does it menstruation usually occur and who does it affect and why?

Women

Explanation:

Menstration usually happens to women betweeen the age of 12 and 53 its when a non fertalised egg is diposed to by the body by shredding the tissue lining the uterus.

it occurs around 10-16 it happens to women.

Menstruation, or period, is normal vaginal bleeding that occurs as part of a woman's monthly cycle. Every month, your body prepares for pregnancy. If no pregnancy occurs, the uterus, or womb, sheds its lining. The menstrual blood is partly blood and partly tissue from inside the uterus.

it should be