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extending @Bipasha: (cant comment yet) As the endometrium gets to the to the mid-cycle (ovulation), the LH surges, and the become more dominant in the "luteinising phase" of the ovary. In this phase, in response to the LH, the ovary secrete progesterone that "stables" the endometrium in the "secretory phase". When the LH drops, ...


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Both FSH and LH are indirectly involved in endometrial thickening: GnRH regulates release of the gonadotropins- luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from specialized cells (gonadotropes) in the anterior pituitary gland LH and FSH promote ovulation and stimulate secretion of the sex hormones estradiol (and estrogen) and ...


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Not all hormones enter the blood - just as a quick addendum to the thorough reply above, and as per a comment above stating not all hormones from neuroendocrine cells go into circulation - seems to be true: many of the neuroendocrine cells release hormones directly into the organ where those cells appear - as per the gut, heart, lungs - here's a nice visual ...


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