Explaination of the uterine and ovarian cycles.
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Explain the hormones and phases of the uterine cycle.
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Solution Summary
In this solution I describe the uterine cycle and the closely related ovarian cycle. I explain the physical and hormonal changes which occur at each step of the 28 day cycle. I also explain what happens hormonally if a pregnancy occurs.
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The Hormones:
Hormonal control of the ovarian/uterine cycles (which are very much connected) begins in the brain, in the hypothalamus.
Gonadotropin releasing hormone (GnRH) - is released by the hypothalmus and stimulates the release of luteinizing hormone (LH) and follicle stimulating hormone (FSH) from the anterior pituitary, located just below the hypothalamus. LH and FSH travel the bloodstream to the ovaries and stimulate egg (oocyte) development and trigger the release of estrogen and progesterone. Estrogen and progesterone stimulate the development of the uterine ...
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