Well so this was the top result on Google on their search page.
When you have sex, sperm are released up into the uterus and Fallopian tube. If you happen to have sex on the same day as you have ovulates, then you could get pregnant the same day. But if you don't ovulate the same day you have sex, sperm can live for up to three days (some day even longer!). So you can get pregnant 1,2 and even 3 days after you have sex. It all comes down to when you ovulate and if there are sperm hanging around or not! The egg only lives for about a day so it's not hanging around as long as the sperm are. Conception means the day the sperm fertilized the egg. Which could be on the same day you had sex or up to 3 days later.
So according to this Paro can be pregnant š but still it does take a while to actually know that through just checkup. if she had a blood test it would have been more logical š