Gynaecology & Obstetrics 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. 💡 Explanation Sampson's Theory proposed to explain endometriosis is ✓ Correct Answer: C. Reflux of menstrual endometrium.