Testosterone levels in women can begin to decline starting in their 20s, often by about 1% per year, influenced by stress levels.

“the top half of the normal range great so that I think is a good benchmark”

“if you look at my arm when you're 20 18 to 24 that's when we start to study reproductive your testosterone's like up here in the 40s for women right and then it kind of goes down like I wish I could do it better but it declines and by the time you're in like those late 30s early 40s is about half of what like if you look at normal ranges studies that have tried to of what you were when you were 18 and then it levels off at somewhat lower in your 40s and 50s and actually goes up a little bit past 60 and kind of levels off like down there”

“it's also worth mentioning uh that that it's the estrogen and progesterone that are coming off really quickly the testosterone is kind of coming off not as quickly we can maybe come back to that in moment”

“but estrogen progesterone really go down testosterone kind of gradually goes down”

“so so male testosterone probably peaks in the 20s and it's just a slow steady decline it's not um it's not like in the case of women where they you know they go through puberty they have these hormones that are cyclical and then fall off a cliff with men it sort of you go through puberty you kind of peak and then you're on a slow uh decline down”