Which oral contraceptive is developed by $CDRI$?

The contraceptive pills for females are composed of . . . . . . .

$A$: Gossypol inhibits spermatogenesis.
$R$: Centchroman inhibits ovulation.

Which of the following functions are true for copper ions released by copper-releasing $IUDs$?
$I -$ Suppress sperm motility
$II -$ Inhibit the fertilizing capacity of sperms
$III -$ Make the uterus unsuitable for implantation
$IV -$ Make the cervix hostile to sperms

Lactational amenorrhea prevents

What is the surgical procedure called where the fallopian tubes are cut and the ends are tied?