When did I conceive?

[newmama91]

The due date I've been given is Thursday 17th of December.

I've calculated this and used different conception calculators and the most likely date of conception/ovulation I've come up with is Thursday 26th of March.

I'm just wondering could this mean I conceived BEFORE or AFTER this date. By after I only mean a day after.

I had sex on the 24th (a Tuesday) and then on the 27th (a Friday).

This past Thursday I was exactly 20 weeks according to measurements of the baby. I am now 20 weeks and 2days.

Congratulations! Does it matter? Or is it a case of two different partners?

If you ovulated on the thurs surely conception is going to have happened fri.

2 different partners

Definitely matters then. If you ovulated Thursday I'm more likely to say it was Tuesday's sperm that hung around to do the job. An egg can sometimes only last 12 hours and so you might not have had a viable egg still floating around by Friday. but I think this is a case of honestly seems like it could be either.
Good luck with figuring it out from here re paternity testing if needs be.

I think you can get a dna blood test while you are pregnant, works in the same way as the harmony test I think.

It would have to be private and I have no idea how much it costs but that would tell you definitively before the baby is born.