What is the effect of birth control pill on colitis?

Can you answer mechflight20’s question about IBS?:

I’ve done a little research and have been starting to find more and more sites that tell me taking the Birth Control pill can lead to the development of Ulcerative Colitis and/or Chromes Disease. Does anyone know if this is true? Or why this would happen? Also what if the person had Proctitis beforehand started taking the pill and has developed Colitis. Could the pill be the reason for it?

Probiotics And Ibs