Her last three months period has started in between 14/05 to 18/05 then 18/06 to 22/06 then 25/07 to 29/07. Normally period cycles varies in between 30-35 Days as can be analyse from above dates. 1. Kindly suggest which dates are safe to have unprotected sex to avoid pregnancy. 2. As per my period cycle data, is there any sure shot dates which can be markes as highly risky dates and which can be marked as minimal risky dates for having pregnancy if unprotected sex occur. 3. As per my period cycle data above, in between which days my ovulation period (egg release period) exists. Will be really grateful for your help to clear my doubts. Have a good day.