Is it possible i could have gotten pregnant from having sex on july 16th, 2011 if my due date is april 28th, 2012? i had a one night stand on july 16th, 2011 and i do not want him to be the father. i was regularly having sex around that time (before and a

Using : Using a standard date of conception calendar your estimated conception date was between aug-04-2011 and aug-09-2011. The most likely conception date was aug-06-2011. Unless there was an error in your dating, wrong last menstrual period, or incorrect dating on ultrasound , which is unlikely, then you can safely assume you became pregnant in early august. You will be delivering soon, when you have your baby you can proceed with a simple dna test to determine paternity. All the best.