Fig. 1
From: Sex differences and considerations for female specific nutritional strategies: a narrative review

Female sex hormones fluctuate cyclically and predictably throughout the menstrual cycle. Estradiol is the primary estrogen secreted, and it is depicted as estrogen in this figure. The phases are defined as follows: EF = early follicular; EL = early luteal; FSH = follicle stimulating hormone; LF = late follicular; LL = late luteal; MF = mid follicular; ML = mid luteal. This diagram was adapted from Oosthuyse & Bosch (2010) [25]