$IUD$ stands for

Which of the following is a once-a-week pill with very few side effects and high contraceptive value?

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.

$A$: Saheli - the new oral contraceptive for the female contains a non-steroidal preparation.
$R$: It is a 'once a week' pill with very few side effects and high contraceptive value.

Which of the following graphs is the correct representation of the level of progesterone in a female who has been using Mala-$D$ as a method of birth control?

Which of the following contraceptive devices makes the uterus unsuitable for implantation and the cervix hostile to the sperms?