Contraceptive is any agent or device used for the prevention of conception.
barrier c. Any device for preventing the entrance of sperm into the cervical canal.
oral c. Any synthetic steroid that is similar to estrogen and progesterone and is taken orally at regular doses to alter the woman's hormonal balance, thereby inhibiting ovulation and preventing pregnancy. Popularly called birth control pill;
postcoital c. Oral contraceptive taken within 72 hours after sexual intercourse;
usually a combination of hormones. Also called morning - after pill; postcoital pill.