Why the menstruation is painful in some women?

Why is menstruation painful in some women

All of you are in std. IX. Why then are some students tall and some short?

Answer the following questions: Explain why some elements are bivalent.

It is required to seat 5 men and 4 women is a row so that women occupy the even palces. How many such arrangements are possible?

Which are the hormones produced in women only during pregnancy?

State whether the following statements are true or false. Correct the false statement: In Klinefelter syndrome, women are sterile.

Answer the following questions Sprain is more painful than fracture. Why?

List down the hygiene practices to be taken during menstruation.

Why is colour blindness more prevalent in males than in females? OR Why do more men suffer from heamophilia as compared to women?