Thoughts please

[Nj5252]

I had a baby on Dec 1st.. I was due Nov 28th.
Found out I was pregnant at 17w5d on June 24th
2nd US on July 20th showed I was 20w1d
Had a couple growth scan since then, all showing different dates due to measuring on the smaller side
Had sex on Feb 26th
March 6th
March 12th and on from then.

My lmp was Feb 15th but I have late cycles/irregular.
Baby was healthy at 6.5 lbs

It doesn't really matter because I'm independent and have a good job just would like to have an idea of when so I can see if the father would like to be involved

[AnnieBrooke]

Well, maybe.  This is not something you will be able to tell from the first estimate of your due date, since as I said, there will be more than a week's margin for error with it because the ultrasound was not very early in your pregnancy.  But February 26 is hard to support because of the fact that the baby was born December 1, not seeming overdue from his size.  (The doctor didn't say the baby seemed overdue, correct?)  I would test with Mr. February 26 but that is mostly just so you never have to worry that you got something wrong that is so important.

[Nj5252]

Thank you! You think I'm fairly safe then with assuming it's not Feb guy?

[AnnieBrooke]

The March 6 and March 12 sex was with different people, I assume?  From what you say, you conceived (rough estimate) between March 8 and March 10, putting both of those guys in range.  The problem is that your due date was not given to you early enough to know this for sure.  If your ultrasound had been in your sixth or seventh week, it would suggest the March 6 sex as the most likely to have produced the baby and probably (but not 100%) would have ruled out March 10.  But by your 17th week, there is more than a week's margin for error when using an ultrasound to determine a conception date.  My guess even so would be to think February 26 is out (since your baby was not over-large).  When you do DNA testing, test with the guys from March 6 and 12, if they are not the same guy.

[Nj5252]

No March 6th and 12th are the same man only Feb 26th was someone different who I stopped seeing

[Nj5252]

Yes

[AnnieBrooke]

How early in the pregnancy did you get your November 28 due date, was that at 17 weeks 5 days?

[Nj5252]

Sorry i meant 21w1d on July 20th*