G'day all. I googled how the Birth Control Pill works and each website I checked mentioned two pills, the mini-Pill and the "normal" pill. My girlfriend is on the "normal" pill. My question is, if the pill is supposed to PREVENT ovulation/her period, why does it say that she takes 7 placebos to ALLOW for her period? Isn't the point to NOT allow for her period to come? How does this make sex safe if she is still ovulating and getting her period??