<unk>  is a medical condition in which women involved in heavy<unk>  experience absence of menstruation of varying periods of time. It occurs because of neuroendocrine dysfunction and is usually reversible.<unk>  is a component of female athlete triad.
Exercise amenorrhoea
Puberty menorrhagia
Lactational amenorrhea
Premenstrual water retention
Functional hypothalamic amenorrhea
Polycystic ovary syndrome
Endometritis
Premenstrual syndrome