noun. the lack of menses from the course of time between pubescence and menopause. Whenever menses do not start following pubescence, the state is regularly called primary amenorrhea. If menses cease, in the period of inexistence of being pregnant or being menopausal, following beginning, the state is recognized as secondary amenorrhea. Alterations to physical or cognitive wellness could well be a causative aspect.
AMENORRHEA: "Tina's sudden amenorrhea in her late twenties when she was not sexually active concerned her gynecologist."