Plus don't forget even for women of child-bearing age, there are extended-cycles birth controls which basically maintain their estrogen levels for 3 months. So cycle really isn't a necessary thing except for reproduction.
WheelyFixed wrote: Mon Dec 30, 2024 3:04 pm "average" E level of a pre-menopausal woman - except that mine stays the same all the time, while a woman's level fluctuates greatly as she cycles...
WheelyFixed