I am 28 weeks pregnant, and I can't figure out the day when I conceived. My OB said I would have conceived on August 31. I'm just so confused. I think the last day of my period was August 22 or 23. When did I conceive?


Pregnancy is based on the first day of your last period. I'm just guessing, but based on the information you provided, your fertility window may have been around the last week of August to the first week of September. You may have conceived around that time. Your OB isn't wrong but is giving an estimated date that you may have conceived.

Updated on March 12, 2018

Original Article:

When Did I Get Pregnant or Conceive?
By Marissa