How many days after periods it is safe to have sex without worry of getting pregnant.

Dr. Niraj MahajanGynaecologist15yrs exp

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If a women?s menstrual cycle varies from 26days to 31days cycle, The shortest cycle (26 days) minus 18 days = 8th day. The longest cycle (31 days) minus 10 days=21st day Thus, 8th to 21st day of each cycle counting from first day of menstrual period is considered as fertile period. So this is unsafe period but it is highly unreliable method for contraception. 

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Dr. Sanjeev Kumar SinghAyurveda9yrs exp

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The best rule of thumb to remember is this: If you are having sex, you can get pregnant. That?s because there is no sure way to know when a woman will ovulate. Though for most women the time of ovulation is right at 12-14 days before they begin their period, some women have different schedules, and are fertile at different times. So figuring out when to have sex to avoid pregnancy can be very difficult, if not impossible. Some women believe that the safe time to have sex is right after their period starts or right before it begins; however, those dates might not be accurate, due to changing schedules and fluctuating hormones. But if you have a regular menstrual cycle lasting around 28 days, 7 days before your period and 7 days right after your period are generally the safe window. Avoid having sex during your fertile days to avoid pregnancy.  

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