Emergency contraceptive is means of contraception used after act of unprotected intercourse. Misoprostol is a prostaglandin which is an excellent agent for causing early and mid trimester aboions but as an emergency contraceptive it has no role as there is no pregnancy to abo in the first three days of intercourse. Emergency contraceptives IUCD: Can prevent implantation up till 5th day of unprotected inter-course Progesterone only pill: LNG 1.5 mg :can reduce tubal motility , make endometrium 'Out of Phase" for implantation of embryo Combined Pill: the Yuzpe regimen can prevent embryo implantation since the estrogen component makes the endometrium unreceptive. Mifepristone, Antiprogestin, RU 486, prevents implantation Ulipristal acetate: SPRM: Selective progesterone receptor modulator