hello dear. understand your concern. you start combine OC pills like mala D,ovral,ovral L,femilon,duoluton L,novelon,yasmin,diane 35,etc... all available in india at cheaper rate also. before starting pills ,your wife should do some test like liver funtion test,blood sugar,pap smear,Blood pressure, weight. you want to continue it for 1-2 years so you should know about its side effects. pills hv some side effects like nausea,spotting,weight gain,missed or delay period,tenderness of breasts,headache,mood swings,vaginal discharge,decrease libido(affect sex drive) ,rarely Hypertension & cardiac complication increase if pt hv it already. oc pills contain 28 tablets,in which 21 white tablets contain estrogen & progesteron hormones,another 7 brown tab.contain iron & vitamins as placebo. so start from 21 tab.,start it from 1st day of your menstruation cycle .it taken daily one preferably bed time for 21 days. then period is coming,you can take 7 brown placebo tab.in this days or not. then start second pack of tab.from 1st day of menstruation cycle again & continue up to 1-2 yr. You have to take it regularly everyday on specific time (make habit by putting reminder in mobile). If you will miss one tablet then take as early possible or on next day along with that day tablet. If you wil missed two period then use other contraception like condoms to prevent pregnancy. You can take sex any time if you are on regular dose of OCP. in between you want get pregnant then stop tab. hope this will guide you. best regards. dr,sagar