if a woman has a period and has had sex, there is a good chance a fertilized egg was probably somewhere around the blood, making every woman in Alabama who has had sex a possible serial killer
Reproduction in humans is not very efficient. Only around 30% of natural conceptions result in successful pregnancies. Of the failed pregnancies around 85% are due to implantation failure.
Seems like it's extremely normal for a fertilized egg to fail to implant and be flushed out during your next period.
Fun fact, there is quite more to learn about everything after school. School will provide you with rather abbreviated and often simplified version of scientific conses from around 50 years ago.
Mate, are you just so confused with what is happening with the responses here? I've literally had an abortion; I'm pro choice. But there's this random pile on of I'm assuming men, telling us what idiots we are.