The unborn baby spends around 38 weeks in the uterus, but the average length of pregnancy, or gestation, is counted at 40 weeks. Pregnancy is counted from the first day of the womans last period, not the date of conception which generally occurs two weeks later.

Can you tell pregnancy at 3 weeks?

Will You Notice Any Pregnancy Symptoms During Weeks 1, 2, or 3? During weeks one, two, or three, you may not even suspect youre pregnant and you might not notice any pregnancy symptoms at all. Its still very early.

Does early positive pregnancy test mean twins?

You cannot conclusively distinguish a single pregnancy from twins on a urine pregnancy test. That said, you may have a very early positive pregnancy test if you are carrying twins.