Yes, one of the diagnostic criteria for anorexia nervosa is amenorrhea. Amenorrhea is the absence of a menstruation for three or more months.
No
This could be anorexia or anemia from lack of iron.
No.
because it just does.
Delayed menstrual cycles have been reported when taking Ciprofloxacin. The delay can also be caused by the urinary tract infection. Both can cause delayed menstrual cycles.
Yes.
Menstrual cycles will come to an end as women go through menopause. Women's menstrual cycles will also be stopped if they fall pregnant, while on hormonal birth control, or after a hysterectomy.
Once a month
No. Humans are the only mammals with menstrual cycles. Deer, as well as other mammals, have estrous cycles. http://en.wikipedia.org/wiki/Estrous_cycle
The average menstrual cycles lasts 28 days - but different women may experience different menstrual cycle lengths, and cycles can change throughout a woman's life.
28 days
because of stuff in them and yeah