Gynaecology & Obstetrics Secondary amenorrhea is defined as A Absence of menstruation for one normal menstrual cycle B Absence of menstruation for three normal menstrual cycles C Absence of menstruation for six normal menstrual cycle D Absence of menstruation for one year 💡 Explanation Secondary amenorrhea is defined as ✓ Correct Answer: B. Absence of menstruation for three normal menstrual cycles