Reproductive Phys Flashcards
female germ cells
oocytes
remain in prophase of meiosis
theca cells
synthesize progesterone
theca w/ granulosa cells
synthesize estradiol
child hood hormone levels
FSH > LH
puberty hormone levels
LH > FSH
GnRH, FSH, & LH INCREASE & PULSATE
2 functions of ovaries
- oogenesis
- hormones (estrogen & progesterone)
functional unit of ovaries
single ovarian follicle
roles of fully developed ovarian follicle
- provide nutrients for oocyte
- ovulation
- prep vagina & fallopian tubes for fertilization
- prep uterus for implantation
- maintain hormone production for fetus
action of estrogen on target tissue
- mature & maintain of uterus, fallopian tubes, cervix, & vagina
- up-regulation of estrogen, progesterone & LH receptors
- Negative & positive feedback on FSH and LH secretion
- Lowering uterine threshold to contractile stimuli
action of progesterone on target tissue
- maintain secretion activity of uterus during luteal phase
- negative feedback on FSH and LH
- Raising uterine threshold to contractile stimuli during pregnancy
Follicular Phase
day 0-14
estrogen levels start to increases
receptors for FSH & LH are up-regulated (theca & granulosa)
FSH > LH
Negative feedback to stop FSH & LH by anterior pituitary
Ovulation
14 days before menses
burst of estrogen secretion
positive feedback causes ovulation
LH > FSH
estrogen levels decease after ovulation
Luteal Phase
Day 14-28
corpus luteum develops & makes progesterone and estrogen
Progesterone is prepping body for fertilized egg
basal temp rises
Menses Phase
regression of corpus luteum & abrupt loss of estradiol and progesterone
Hormone combinations of hormonal contraceptions
estrogen & progesterone
OR
progesterone only
