A woman has certain queries as listed below, before starting with contraceptives pills. Answer them.
a. What do contraceptive pills contain and how do they act as contraceptives?
b. What schedule should be followed for taking these pills?
a. Progesterone or progesterone-estrogen combination which inhibit ovulation, implantation and alter the quality of cervical mucus to prevent or retard the entry of sperms.
b. Taken daily for a period of 21 days starting within first five days of menstrual cycle (to be repeated after a gap of 7 days)