Re: Ovarian Cyst!
Most definitely you can develop ovarian cysts while on the pill. It is now known that the modern generation of birth control pills do not completely prevent women from growing follicles (ie. cysts) and that most of the birth control occurs due to the endometrial lining being kept so thin (due to the progesterone).
I myself developed a very large ovarian cyst which I am convinced occured while on the pill (although they discovered it just after I had stopped taking the pill due to irregular bleeding .. after 20 years of being on the pill my endometrial lining was so weak that it was actually bleeding .. going off the pill solved that problem).
My personal opinion is that the lower dose pills may actually cause cysts to occur and not keep them from occuring. This is because they are not strong enough to keep follicles from growing on the ovaries but they are strong enough to mess with the stimulating hormone that induces ovulation (ie. the "breaking open" of the follicle to release the egg). This messing around may prevent a follicular cyst from doing what it is supposed to thereby causing a persistent cyst. My 8 cm cyst has been there for almost a year now and since it is a simple cyst (fluid filled) we are keeping an eye on it with regular ultrasounds.
I sincerely regret ever having gone on the stupid birth control pill and although I will never know if it caused this or not, I wish I could have allowed my body to function naturally instead of playing around with my body's hormonal balance. The pill is supposed to cut ovarian cancer risk in half after 5 years of use and although this is not supposed to be one of my worries due to having been on oral contraceptives for so long, this is now exactly what my biggest fear is. Go figure ...
Anyway, to answer your question, it is now known that modern oral contraceptives neither prevent cysts from occuring nor hasten their disappearance (doctors still try to use oc's to "cure" large ovarian cysts .. this is for nothing and many current studies support this).
Hope this helps.