Estrogen and Progesterone

[prsndwg]

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Can someone tell me these two hormones are secreted from both follicle and corpus luteum? or both are just from corpus luteum and estrogen is the only one from follicle?!

 

[razblo]

I believe just estrogen comes from the follicle, but BOTH progesterone and estrogen come from the corpus luteum.

 

[prsndwg]

I believe just estrogen comes from the follicle, but BOTH progesterone and estrogen come from the corpus luteum.

thats what I thought too.. but cliff says its both!😕

 

[razblo]

This seems like a decent video. It covers about the same as Cliffs http://www.youtube.com/watch?v=8_rfZ_qj1z4

I think I see where you might be getting confused. The corpus luteum develops from the follicle once ovulation starts.

Hypothalamus --> GnRH --> Anterior Pituitary releases FSH --> Follicle secretes estrogen --> Anterior pituitary releases LH (because of estrogen) --> LH causes ovulation to start --> Corpus Luteum (this is what the follicle is called after ovulation has started) secretes estrogen and progesterone --> endometrium thickens because of estrogen and progesterone --> this step varies whether there is implantation or not