If the human body is the most advanced and perfect machine on the planet - then why am I having a fucking period?? Periods happen in ANTICIPATION of conception - the womb gets all padded out ready for babiesville - and then when it realises you're not pregnant it's all "Oh - sorry about that [BLEED BLEED BLEED]" - utter rubbish!! If it was so perfect then it would only bulk out if you sodding well got pregnant - not every month!!