When did I conceive

[Tabithalevi]

Hi, I’m new to all this but I really do need some help 😔
I had a “period” on the 26th November which lasted 5 days ended on the 30th I then had intercourse around the 4th December and again on the 10th leading to the 11th December. When was I most likely to have gotten pregnant? I have an app which says I was ovulating around the 11th December but not sure how accurate that is because my periods can sometimes be irregular.

I also had my 1st scan on feb 19th 2021 they dating me 11 weeks 5 days but I would have been on my period then so it doesn’t make sense to me. My due date is 5th September 2021 and am now 15 weeks 3 days according to my first scan.
Which date was I likely to have conceived. Please help me :) 😔 x Hopefully this makes sense

Hi @Tabithalevi the amount of weeks you are is meant to date you back to the first day of your last period, not when you conceived. So if you're 11 weeks pregnant then you'd have conceived 9 weeks ago. I hope that makes sense but looking at your dates it seems you probably ovulated around the later date you mentioned 😂

It's difficult to pin point with the data you've given. But it's more likely that you've conceived with the sex on 10th/11th December. Unless there is a question of "who is the dad" I wouldn't worry about the whole when did I conceive thing as scans are a lot more reliable than guessing how long the sperm lived in your body. As long as baby measures fine, it would only be a few days difference either way, depending on when you actually ovulated.

It's probably more likely you fell pregnant from the 10th/11th.
But no way to tell 100%.

If they dated you at 11 weeks 5 days back then, it just means you ovulated a few days later than a 'typical' 28 day cycle. As that's only based on an estimated ovulation.
So probably even more likely you fell pregnant from the 10/11th

As PP said, unless it's a case of being 2 different men, I wouldn't worry.

Sperm can live inside for up to 5 or 6 days. So just because you had sex on a certain day, doesn't mean you actually conceived that day

Your dating scan is correct - how many weeks pregnant you are is based on your last menstrual period.