menstrual cycle

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4 Terms

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GnRH

from brain, at puberty, to pituitary

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GONADOTROPINS

1. LH - Luteinizing hormone
2. FSH - Follicle stimulating hormone
3. In Males:
a. LH + FSH → testosterone
b. FSH + testosterone sperm production
4. In Females:
a. LH + FSH  maturation of ovaries  ESTRO & PROGES.
b. FSH - initiates menstrual cycle
maturation of follicle
c. LH - triggers ovulation
follicle  corpus luteum

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3 PHASES

28 days, if NO fertilization

  • PROLIFERATIVE/FOLLICULAR

  • LUTEAL/SECRETORY

  • FLOW/MENSES

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IF FERTILIZATION

a. C.L. preserved   progesterone &  estrogen
b. Cycle stopped
c.  progesterone = pregnancy maintenance hormone
d. H.C.G. = prod. by placenta to maintain pregnancy, urine