Ultrasound dates - 2 potential dads

[earlytwentiesmama]

Hi everyone,

I had a dating scan today and it was 10+3. I had sex on the 8th January when I think this happened? Would that be about right?

I only ask as I had sex with a different man on 26th December as well but that is 15 days difference and would make me more 12+4 so I'm sure it's the first man?

I'm just doubting myself? There's no issue with either of the potential fathers I'm just sure one is a hell of a lot more likely than the other.

Thankyou.

When did you ovulate?

January sounds much more likely. Pregnancies are dated from the start of the last period, and you would have ovulated about two weeks later (assuming a 28 day-ish cycle).

Currently at 10w3d you’re looking if conception 2nd week of Jan.

Your scan date puts your conception at around 7th Jan so yes I’d say most likely the man you had sex with on 8th Jan