Hi, My sister had unprotected sex 4 days ago (with no ejaculation) and now she's started started her period! Does this mean she is not pregnant ;(

Thanks for your answers

Um... why do you think it matters if he ejaculated or not? You do know sperm leak out ALL the time... and not just at that moment?

Your sister needs to take classes on human reproduction... because she's likely to be pregnant soon even if she isn't this time.

You posted "am I pregnant" so is it you or your sister?

But of course she could be pregnant, there are plenty of sperm in the early fluids, she will need to wait a month and see if she has the next period