Guide Questions: Q1: Which hormones produced by the pituitary gland that promotes ovulation and stimulate the ovaries to produce estrogen and progesterone? Q2: The phase of menstrual cycle where the level of female hormones are very low? Q3. The phase of menstrual cycle where a mature egg cell is released? Q4. The phase where the Progesterone and estrogen cause the lining of the uterus to thicken more?
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1. GnRH stimulates the pituitary gland to produce follicle stimulating hormone (FSH), the hormone responsible for starting follicle (egg) development and causing the level of estrogen, the primary female hormone, to rise.
2. When the follicular phase begins, levels of estrogen and progesterone are low. As a result, the top layers of the thickened lining of the uterus (endometrium) break down and are shed, and menstrual bleeding occurs.
3. Ovulation. Ovulation is the release of a mature egg from the surface of the ovary. This usually occurs mid-cycle, around two weeks or so before menstruation starts. During the follicular phase, the developing follicle causes a rise in the level of oestrogen.
4. During most of the luteal phase, the estrogen level is high. Estrogen also stimulates the endometrium to thicken. The increase in estrogen and progesterone levels causes milk ducts in the breasts to widen (dilate).
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and stimulate the ovaries to produce estrogen and progesterone? Q2: The phase of menstrual cycle where the level of female hormones are very low? Q3. The phase of menstrual cycle where a mature egg cell is released? Q4. The phase where the Progesterone and estrogen cause the lining of the uterus to thicken more?