Eumenorrhea

Runners with amenorrhea experience more running-related injuries than runners with eumenorrhea, and an increased incidence of stress fractures.

The prevalence of eumenorrhea among women with PCOS is significantly increased if the Rotterdam diagnostic criteria are applied, because hirsute eumenorrheic women with polycystic ovaries are included.

In eumenorrhea, menstrual cycles occur at intervals of 25 to 35 days.