Crazy Guideline: If you have quite regular cycles, ovulation could have occurred around the 20th. The egg lasts 24 hours and sperm is only viable for 3-5 days. Therefore conception would be unlikely after the 17th. However be advised that these dates presuppose a very regular cycle of 28 days and are merely estimates. If you miss your period,get a pregnancy test or discuss this with your gynecologist.
Answered 3/23/2016
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