Question on when I conceived; two potential dads

[Mamalove22]

To start off I have done prenatal paternity test through ddc with the fling (used condom and pullout method) and got a 0% paternity result & then tested hubby (no protection) with accurate dna and got 99% result.

However I am due soon and I’m freaking out about my results and want to know if my dates align for my hubby.

LMP MAY 10-15

Sex with hubby: April 30-May 19
Sex with fling: just May 20&21 with condom and pullout method

Positive pregnancy test: June 4

First ultrasound dating scan : June 30th I was 7w and 1 day

Who does my dates align with?

[AnnieBrooke]

Hi, what is your due date?

[AnnieBrooke]

Also, did you continue to have sex with your husband after the sex with the fling, like, around the last week of May?

[Mamalove22]

Due date feb 15 and no I did the last week of May but did in June  

[Mamalove22]

Sorry I did not have any other intercourse after the fling on May 20&21.
I used condom & pull out with the fling guy.

[AnnieBrooke]

Also, is the baby a girl?

[Mamalove22]

It’s a boy.

[Mamalove22]

First early transvaginal ultrasound was at 7w 1d on June 30th.

[AnnieBrooke]

So, where you say you didn't have sex the last week of May, but did in June, when in June? Closer to June 1 or closer to June 15? I'm trying to figure out whether your dates say anything different than your DNA tests, and none of the sex you've specifically named by date makes a lot of sense for producing the pregnancy. You'd be better off going with the two DNA tests than trying to figure it out from the dates you've given for sex, unless of course you had sex around June 1.

[AnnieBrooke]

(Though, of course, June 1 would be too late because you got a positive on a home test on June 4.)

[AnnieBrooke]

Based on your estimated due date (from your ultrasound), conception was from sex that happened the week of May 18-25. At 7 weeks pregnant, if someone uses an ultrasound to try to gauge when conception was, the margin for error is 1 or 2 days, and sperm can live 4-6 days in the woman's reproductive tract. This means the ultrasound evidence gives you a range of a week or more. It isn't as useful as DNA-test evidence, which you already have.

Your strongest evidence is, in fact, that you got a positive DNA match with one guy and a negative with the other, from two tests at two different labs. At 99% and 0%, the numbers are not even equivocal. For something to be wrong, both men's tests would have to independently be wrong. I just don't see that happening.