I had sex with 2 men at least a week apart, who is the father?

[pandapants29]

I had sex with man A on August 24th and started my period that same day. I then had sex with my boyfriend after August 28th consistently. My original due date using LMP was May 31st. My ultrasound yesterday measured me at 11 weeks, moving my due date up 5 days to May 26. Is man A or man B the father?

[AnnieBrooke]

Man B.  You had a period and would not have been ovulating, and he is too early to match your dates.

Are your menstrual cycles regular, or do they vary? How many days is it usually from the first day of one period to the first day of the next?

[pandapants29]

They vary between 26-28 days. I took the pregnancy test two days after my missed period because I’m so regular I knew something was off.

[pandapants29]

I’m concerned that the u/s could be up to an additional 5 days off so potentially I could have conceived Aug 28? Can you ovulate the day after your period is done?

[AnnieBrooke]

You ovulate 14 days *before* your next period. When the flow from your last period ends doesn't indicate anything, since the old period does not trigger the new period, ovulation does. But that said, August 28 would be 4 days after your last period began, and that would be a very early ovulation. You would have to have 18-day menstrual months to ovulate 4 days after your prior period began. If you are regularly 26 to 28 days in your menstrual month, you would have been expecting your period on around the 19-21 of September. I suspect your ultrasound that said you were 11 weeks was indeed a little bit off, but the other direction than you are worried about. A due date of May 26 suggests conception September 3, but if you subtract 14 days from your shortest usual menstrual month length (26 days) that's September 5, which seems more logical. Even though that is pretty early, it is still out of range for the life of sperm from sex on August 24, which all would have been dead by then.

If these dates are all too close for comfort, you can get a prenatal DNA test; I'd suggest you do it with both men for your own peace of mind. (Not that the top labs aren't trustworthy, it's just that women get nervous.)

[pandapants29]

Logically I know that the science is saying that it doesn’t check out. And your opinion was a help in easing my mind. I’m just emotional and have tunnel vision right now, but the more I research and ask questions the more I’m agreeing with the fact man A isn’t it. I’ve just been with man B for over a decade and we’ve never been pregnant. Man A also pulled out, not that it doesn’t mean he couldn’t have pulled out a little late. In my heart I think it’s my boyfriend, but I don’t know if that’s just my powerful wishful (hoping, praying) thinking.

[AnnieBrooke]

My vote is with logic, though I know the women writing here are not letting logic rule. :) I don't think you ovulated that early -- 4 days after your period began would be unusual enough to note in medical journals. The earliest I've ever heard of is 9, and even that was someone with wild cycles that were sometimes 19 days and sometimes 39 days. It sounds like your body is pretty regular and you can count on ovulating about 14 days before when your next period was expected.

[pandapants29]

I had another ultrasound and was told fairly emphatically that this is a September baby and that man A could not be the father. My head is a little more clear and less full of anxiety and emotions and I’m feeling much more at peace. Thank you for your feedback!!

[AnnieBrooke]

You're welcome. See a counselor if you're ruminating a lot on it and scaring yourself, because when you get to a point of not believing doctors you are doing yourself a serious disservice. Stay calm, and congratulations on your upcoming child. :)