Soo confused :(

[amanda531]

I am really confused as to who the father of my baby is and I could use some help. I have very irregular periods so when I found out I was pregnant in early January I didn't remember the exact date of my LMP. I was told at the ER I was due in early august and that I'd have an ultrasound later at my doctor's office to figure it out more accurately. Once I had my first ultrasound it was pushed back to August 25. I then had my second trimester ultrasound on March 2 and I was moved back again. They said I was 13 weeks 3 days and due September 7. On April 13 I went back for my gender reveal ultrasound and my due date was once again moved back this time to September 12. The problem is I was sleeping with 2 guys in November and December which is the time I got pregnant based on these due dates. I slept with Man A pretty consistently from middle of November through December 9. I slept with Man B on November 25 and December 21 only. Depending on what due date I go by a different man would be the father. Please help!

[AnnieBrooke]

Sweetheart, I think I already said that either guy could be the dad, based on your first (and therefore most accurate for dating the pregnancy) ultrasound.  If your changing due dates are freaking you out, please go over everything really carefully with the doctor the next time you are in, and ask why they changed.

[amanda531]

Sorry to post again but with my due date getting closer I'm getting really nervous. Why would my due date keep getting pushed back by that much if the first ultrasound was accurate? I've heard that in the second trimester it gets a little less accurate but I was still in my second trimester when I got my September 7 and 12 due dates. September 12 is really far off from August 25. Can my baby really be that small? I'm 5'10. Man A is 5'8 and Man B is 6'1 so I wouldn't expect to have a really tiny baby.

[AnnieBrooke]

Frankly, I would only count on an ultrasound that was done earlier than the end of my 8th week, for dating conception.

[amanda531]

Thanks for your help Annie. So the September 7 and September 12 due dates aren't important for figuring out when I conceived since they were both given to me past 12 weeks?

[AnnieBrooke]

Sorry, Amanda, if all the sex was unprotected, it could be either guy.  The first ultrasound is the best for trying to determine a date of conception, since babies grow at different rates and over time the ultrasounds get less and less accurate if a baby is growing more slowly or quickly than normal.  Evidently your first ultrasound that gave you a specific date was the one that gave you August 25.  (If you were past 11 or 12 weeks by then, there is already a margin for error of a week by that time in pregnancy, but say you weren't when you got the one that said August 25.)  An August 25 due date gives the following:

     Probable date of ovulation:  December 2
     Possible dates of conception:  November 28 to December 6
     Due date:  August 25 (40 weeks)

Meaning that sperm from Man B might certainly have been in your system and viable as of November 28 or 29.  

The only answer here, and the only fair thing for everyone, is a DNA test.