Sex steroid metabolism and action

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Sex steroid metabolism and action
Cholesterol
Acts on progesterone receptor
Progesterone
aromatase
Testosterone
Estrogen
Acts on estrogen receptor
5a-reductase
Dihydrotestosterone
Blue lines are predominant in females Red lines
are predominant in males
Acts on androgen receptor
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Figure 46.15
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Negative and positive feedback during ovulation
First half of follicular phase
Second half of follicular phase
GnRH
GnRH
FSH
LH
FSH
LH
-


P
E
P
E
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