bild2_24

bild2_24 - (a) Control by hypothalamus Hypothalamus GnRH...

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Control by hypothalamus Inhibited by combination of estradiol and progesterone Stimulated by high levels of estradiol Inhibited by low levels of estradiol Hypothalamus GnRH Anterior pituitary FSH LH Pituitary gonadotropins in blood LH FSH FSH and LH stimulate follicle to grow LH surge triggers ovulation Ovarian cycle Growing follicle Maturing follicle Corpus luteum Degenerating corpus luteum Follicular phase Ovulation Luteal phase (a) (b) (c) Days 0 5 10 14 15 20 25 28 | | || | | + Fig. 46-14a: Reproductive Cycle of the Human Female
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Ovarian hormones in blood Peak causes LH surge Estradiol level very low Estradiol Progesterone Ovulation Progesterone and estra- diol promote thickening of endometrium Uterine (menstrual) cycle Endometrium 0 5 10 14 20 25 28 | | || | | Days 15 Menstrual flow phase Proliferative phase Secretory phase (d) (e) Fig. 46-14b: Reproductive Cycle of the Human Female (cont’d)
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Fig. 46-14: The Reproductive Cycle of the Human Female (a) Control by hypothalamus Hypothalamus GnRH Anterior pituitary 1 Inhibited by combination of
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bild2_24 - (a) Control by hypothalamus Hypothalamus GnRH...

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