Fig. 6
Recommended revision to the STRAW + 10 staging system to include the transparent operationalisation of premenopause and define regular menstruation as the number of menstrual cycles per 3 months, as a minimum requirement, which would be a practical reporting timeframe both clinically and for women to recall accurately. *, blood drawn on cycle days 2–5; FSH, follicle stimulating hormone; AMH, anti-mullerian hormone; ↑, elevated. Figure is a modification of work found in Harlow et al. [11]