Gynaecology & Obstetrics General 9bd5d468 Sampson's Theory proposed to explain endometriosis is A Embolization of menstrual fragments through lymphatic channels. B Metaplastic changes in embryonal cell rests. C Reflux of menstrual endometrium. D Histogenesis by induction. High-Yield Explanation Sampson's theory: Reflux of menstrual endometrium through fallopian tubes causes endometriosis.