Influence of combined oral contraceptive pills on the state of ovarian follicles and endometrium Journal title: Ginekologia i Położnictwo medical project Authors: Zbigniew Szymoniak, Martyna Siąkowska, Agnieszka Mitkowska, Robert Zawrotniak, Marcin Korman, Mateus... Subject(s): Medicine, Gynecology, Obstetrics & Gynecology