Progesterone Breast Growth . Men and women both have mammary glands so what's the difference well we saw that they'd have the ducts and the differences in size but the big difference is that when do mammary glands develop they typically develop during puberty so before puberty they they're pretty much identical in boys and girls before they develop they undergo puberty so they have the basic structure of undeveloped mammary gland but it's the changes in puberty that caused the development of mammary glands now what happens is that you have an increase in pro estrogens and progestogens in p when you start off the menstrual cycle and um and a girl has her first menarche her first menstrual cycle that's when you start to have that cyclical waves of estrogens and progesterone but what happens in male puberty is that you have increased levels of androgens you do have some estrogens and aromatase as well but this is things like you'll get increased high levels of andr...
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