What is the full form of $CDRI$?

The use of . . . . . . is very effective as an emergency contraceptive.

Identify the false statement regarding the techniques of contraception.
$I$. There are many side effects of tubectomy and vasectomy.
$II$. The purpose of tubectomy is to prevent egg formation.
$III$. The most important component of the oral contraceptive pill is progesterone.
$IV$. Contraceptive oral pills help in birth control by preventing ovulation.

How do injectable contraceptives ($DMPA$ - Depot Medroxyprogesterone Acetate) prevent ovulation?

Which of the following is a hormone-releasing $IUD$?

What happens after a vasectomy?