My inquiry is the following. I had sex on july 23rd and august 15th. I believe i got my menstrual period on july 31 or august 1st. i took a pregnancy test on september 1st which came back positive. When i went to my obstetrician on 10/22 he told me i was about 12th weeks. I gave birth on may 5th. Based on this information can you tell me which date (july 23rd or august 15th) did i likely conceive. Your professional answer will be greatly appreciated. Thank you in advance.