Clinical management of functional ovarian cysts: a prospective and randomized study.

Most ovarian cysts in women of reproductive age are physiological (functional) and patients have been treated for years with oral contraceptives to obtain the resolution of these cysts. Expectant management has been suggested to have the same effectiveness as hormonal treatment but such suggestions come from studies including all kinds of cysts. The objective of the present study was to assess the resolution of functional ovarian cysts, observed after ovulation induction, with expectant management and hormonal treatment and also to determine the period of time necessary for the resolution of the cysts. For this purpose, 53 patients with ovarian cysts, observed by transvaginal ultrasound within the first 5 days of a cycle after ovulation induction, were randomized to have expectant management (group A) or to receive oral contraception (group B) for one cycle. If the cyst persisted, the patient was followed for another cycle, without any treatment. Within the 50 women who completed the trial, a complete resolution of the cysts was observed in 19/25 (76%) and 18/25 (72%) in groups A and B respectively. On the other hand, all the persistent cysts disappeared after a second cycle without any treatment. In conclusion, expectant management is as effective as oral contraceptives for the resolution of functional ovarian cysts induced by ovarian stimulation. However, studies with a larger number of cases are needed to increase the power of the results and to obtain a firm conclusion.