Are you considered 4 weeks pregnant if you BD 4 weeks ago, or is that less pregnant for the sperm to travel?

Pregnancies are counted from the first day of your last menstrual period - which is a little confusing because you're not actually pregnant for about the first 2 weeks - but it's consistently done this way by all doctors to try to remove the confusion of when the child was actually conceived if you don't ovulate exactly 14 days before your period.