Hi, I discovered that i was pregnant in the month of january. the dr says that i was 8 weeks preg. Weeks later when i visited my dr and got an ultrasound i discvored i was 18 weeks and five days. so when i counted back 8 weeks and five days it led me to December 11 2013. Me and my spouse were broken up then but were still dealing with one another on an intimate level at the end of november 29th through December 2nd. so my concerns are is it possible that he could be my childs father if it takes 8-12 days for the sperm to reach egg? On the date of December 7-10 i was dealing with someone else so basically im just trying to figure out this process.??? HELP PLEASE!!! Remember my conception date was December the 11th.. the other person that i was dealing with was on the date of December 7.