DescriptionEffects of GnSAF on early and late follicular phase.png
English: During early follicular phase, GnSAF secretion from the ovarian follicles is high and has a negative feedback effect on the pituitary. As the ovarian cycle progresses to the late follicular phase, the regression of non-dominant follicles limits GnSAF biosynthesis, which reduces the overall inhibitory effect of GnSAF on the pituitary. Once pituitary sensitivity is restored, LH secretion surges. Broken lines represent absence of action and size of the arrows indicates relative concentrations of the hormone.
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