Since this is not my area of expertise, I searched Google under the key words "FSH estrogen relationship" to get this:
http://www.google.com/search?client=safari&rls=en&q=FSH+estrogen+relationship&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
During the follicular stage of the menstrual cycle, both FSH and estrogen are high, but aren't estrogen and FSH on a negative feedback loop?
Is it just because FSH is not directly involved in the increase of estrogen (it is the follicle that increases estrogen) that both of them remain high?
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