DefinitionSecondary amenorrhea occurs when a woman who has been having normal menstrual cycles stops getting her periods for 6 or more months.Amenorrhea is when a woman does not get her monthly menstrual cycle, or period.See also:Menstruation - AbsentPrimary amenorrheaAlternative NamesAmenorrhea - secondary; No periods - secondary; Absent periods - secondary; Absent menses - secondary; Absence of periods - secondaryCauses, incidence, and risk factorsWomen who are pregnant, breastfeeding, or in menopause are not considered to have secondary amenorrhea.Women who are taking Birth Control pills or receive hormone shots such as Depo-Provera may not have any monthly bleeding. When they stop taking these hormones, their periods may not return for more than 6 months.You are more likely to have ame