question from my gf

she wants to know why when she has sex or been fingered or somethin like that she will start to bleed and it starts her period. She is on birth control and when this happens its screws all her pills up and that lets her mom know she has done something which she dont want......she has went to the doctor for this and they wouldnt tell her the reason why she would bleed.....does anyone know about this time thing and if so what can she do to stop it?

 

break through bleeding? it will happen

 

could be HPV. i used to bleed when I had it. almost every sexually active person has it.

 

what exactly is HPV

 

http://en.wikipedia.org/wiki/Human_papillomavirus