Figure 2.

Hormone level changes in predominant physiological estrogens with increasing age in females compared to males, and during menstrual cycle phases.

Note: These levels are depicted on scales three orders of magnitude lower than those used in Figure 1. The levels of the estrogens estrone, estradiol, and estriol (E ₁, E₂, and E₃, respectively) are shown for females (♀) and males (♂). The cycle phases depicted are early follicular (EF), pre-ovulatory (PO), midcyle peak (MP), luteal (L), and postmenopausal (PMlevels). Graphed from published data tables.²²⁶