[arutha]

My gf recently started on Yaz, now the pill packet says if you miss a pill you are not protected for the next week (fair enough) but also that you are not protected for the previous week. Is that really true? If she misses a pill and we have had unprotected sex in the past week what should be done about it? I am not sure I completely trust the pill as an effective form of birth control on its own, but she is more than willing to just use it and doesn't want to go back to using condoms as well...

I am also not completely sure how it works, it says it prevents ovulation... But when she takes the sugar pills she obviously gets a period. Is it still safe all the time even then? What is it really doing, just preventing sperm from getting to the egg?