I am not a nurse by any means, but the most fertile day of a woman is day 13 and day 14 of her cycle. Day one being the first day of her period. So, two weeks after is most likely her fertile time. I am sure everyone is different tho, but this is what my husband and I have been "trained" on in the last few years.

I do know that stressing over your period seems to mess it up too, so try not to let you stress about it and make it late.

Good luck.

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~Tainted Love~