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If you are not Planning for Pregnancy
and if you want to go in for a Emergency Contraception
using I-Pill, you should be taking it within 72 Hours of Unprotected sex and the second dose after 12 Hours of First dose. Always insist on your Partner for using a Condom for Double Protection.
The safe Period to Prevent Pregnancy is to have sex from the last day of your period to the 10th day and from 21st day to the next expected Periods.