Some of the questions being asked are starting to amaze me. Whether someone is trying to get pregnant or trying not to it seems there is very little understanding in basic reproductive health. Most people on here are adults yet don't understand basic health. If you're this uneducated about the human body why are you sexually active and why are some of you trying to bring a life into this world. I don't expect people to be as knowledgeable as doctors but it's your own body and you have no clue how it works. I just don't understand this at all!