New Research Provides Theory on Why Women Stopped Menstruating Upon Arrival at Nazi Death Camps

98% of women imprisoned in Nazi concentration camps during the Holocaust experienced amenorrhea, or the absence of menstruation. A new theory proposes the sudden cessation of menstruation of these women was too uniform to be the effect of trauma and malnutrition alone, but rather caused by the administration of synthetic steroids in their food supply that halted menstruation and impaired the ability to produce children.