PHYSIOLOGY
REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Progesterone levels rise during the luteal phase of the ovarian cycle and the secretory phase of the uterine cycle
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Menstruation occurs just after LH and FSH levels peak
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Menstruation occurs after progesterone levels drop
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Estrogen levels rise before ovulation, while progesterone levels rise after
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Detailed explanation-1: -Statement c is false. Just prior to the middle of the cycle (approximately day 14), the high level of estrogen causes FSH and especially LH to rise rapidly, then fall. The spike in LH causes ovulation: the most mature follicle, like that shown in Figure 2, ruptures and releases its egg.
Detailed explanation-2: -Several hormones are involved in the menstrual cycle of a woman: follicle stimulating hormone (FSH ) causes the maturation of an egg in the ovary. luteinising hormone (LH ) stimulates the release of the egg. oestrogen is involved in repairing and thickening the uterus lining, progesterone maintains the uterine lining.
Detailed explanation-3: -During the luteal phase, luteinizing hormone and follicle-stimulating hormone levels decrease. The ruptured follicle closes after releasing the egg and forms a corpus luteum, which produces progesterone. During most of this phase, the estrogen level is high.
Detailed explanation-4: -In girls or children assigned female at birth (AFAB), FSH and LH trigger their ovaries to begin producing estrogen. This hormone is responsible for physical changes of puberty, such as breast development and menstruation.