The primary purpose of tubectomy is to prevent .........

The chemical method of contraception includes:

Find out the correct aspects of lactational amenorrhoea.
$I$. Ovulation does not occur during the lactational period.
$II$. Chances of the failure of contraception are almost nil up to six months following parturition.
$III$. Side effects are almost nil.
$IV$. It is a natural method of contraception.
$V$. It increases phagocytosis of sperms.

Which of the following is incorrect regarding vasectomy?

'Nirodh' is a popular brand of

Describe the sterilization method with a diagram.