GYN PHARM Flashcards
(50 cards)
What does the hypothalamus release?
GnRH in pulses
What does the anterior pituitary release?
FSH, LH, Prolactin, TSH
What is the function of FSH?
Stimulates follicle growth and estrogen secretion
What is the function of LH?
Triggers ovulation and corpus luteum formation
What does Prolactin do?
Inhibits GnRH, leading to lactational amenorrhea
How does hypothyroidism affect prolactin levels?
Hypothyroidism increases TRH, which increases prolactin
What is the role of estrogen in negative feedback?
Initially inhibits FSH, then stimulates LH surge (positive feedback)
What does progesterone do in the menstrual cycle?
Inhibits GnRH, FSH, LH to prevent multiple ovulations
What triggers ovulation?
LH surge
What does high FSH indicate?
Menopause
What does increased prolactin lead to?
Amenorrhea
What is the vaginal environment compared to?
Self-cleaning oven
What occurs during the Follicular Phase of the menstrual cycle?
Menstrual bleeding (days 1–5), FSH increases, follicle maturation, and increased estrogen
What triggers ovulation?
LH surge on Day ~14
What happens during the Luteal Phase?
Corpus luteum secretes progesterone; if no implantation, corpus luteum dies, leading to menstruation
What is the role of estrogen in the menstrual cycle?
Drives endometrial growth
What is the role of progesterone in the menstrual cycle?
Maintains uterine lining
What happens to basal body temperature after ovulation?
Increases by 0.5–1°F
What are the stages of ovarian folliculogenesis?
Primordial, Primary, Secondary, Tertiary/Graafian, Ovulation, Corpus luteum, Corpus albicans
What do theca cells produce?
Androgens
What do granulosa cells do?
Convert androgens to estrogen
What occurs during the menstrual phase of the endometrial cycle?
Shedding of the endometrial lining due to low estrogen and progesterone
What occurs during the proliferative phase?
Estrogen-driven thickening of the endometrium
What occurs during the secretory phase?
Progesterone-driven preparation for implantation