Psychology 2075 Lecture Notes - Lecture 6: Ovarian Follicle, Luteal Phase, Premenstrual Syndrome

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Male and female external and internal genitals and reproductive organs. Sex hormones are chemical substances manufactured in the gonads (testes, ovaries) and adrenal glands and secreted directly into the bloodstream. Testes and ovaries are analogous and homologous: testosterone. Sex hormones function within the hypothalamus pituitary gonadal axis or functional chain: gonads secrete hormones negative feedback loop. Follicular phase: fsh causes ovarian follicle development. Ovulation phase: lh surge causes ovulation, mature egg emerges from the ovary, ovary is not physically connected to fallopian tube egg migrates toward the fimbria. Luteal phase: follicle become corpus luteum, endometrium becomes secretory, corpus luteum secretes progesterone which via feedback loop eventually reduces estrogen and progesterone production. Menstruation: hormonal support for development and maintenance of endometrium withdrawn, endometrium is shed in menstruation, low levels of estrogen and progesterone soon trigger new cycle of follicular, ovulation, luteal phases Menstrual (ovarian) cycle: length and timing of menstruation.

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