Why is menstruation painful in some women

Why the menstruation is painful in some women?

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

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

Form a 'committee' of two , from 3 men (M_(1),M_(2),M_(3)) and 2 women (W_(1),W_(2)) . Complete the following activity to write the sample space. (i) Committee of three men = square,square,square (ii) Committee of two women =square (iii) Committee of one man and one women { M_(1)W_(1), square square, square square, square square, square square, square square } :. Sampe space = {____,____,____,____,____,____,____,____,}

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

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

Which are the hormones produced in women only during pregnancy?

Why some reactions of glycolysis are reversible and some irreversible.

Why some of the organs in human body are most valuable?