Give differences : Vasectomy and Tubectomy

$A$ : Intrauterine devices $(IUDs)$ are very effective contraceptive method.
$R$ : $IUDs$ don't allow sperms to enter the uterus.

Comment on the essential features required for an ideal contraceptive.

Periodic abstinence is avoiding sex during

IUDS within ………. of coitus have been found to be very effective as emergency contraceptives as they could be used to avoid possible pregnancy due to rape or casual unprotected intercourse.