female Flashcards
(29 cards)
female reproductive system
-make eggs
-fertilize
-place for fetus
-labour
- female sex hormones
(EFFLS)
ovaries
eggs produce and mature
* Produce estrogen and
progesterone
Fallopian tubes (oviducts)
carries cell + fertilization
uterus
fetal development
endometrium
Lining thickens monthly so fertilized egg implants
no fertilization = period starts
cervix
Glands secrete mucus.
Blocks bacteria.
Helps sperm move.
vagina
Birth canal,
menstrual flow exit, site of intercourse.
Lubricated by cervical mucus.
Acidic pH keeps it healthy.
vagina length
8-10 cm
egg cell ovum
-bigger than sperm
-1 ovum matures each month
follicles
egg development (oogenesis).
matures n releases an egg during ovulation.
Fimbriae move the egg to the fallopian tube.
follicles produce
Specialized tissue produces estrogen.
how long does egg survive in tube
24 hours
corpus luteum
-Forms from follicle after ovulation.
-Produces pregnancy hormones (progesterone & estrogen).
-Breaks down after 10 days if no pregnancy occurs.
FSH
-stimulates follicular growth in ovaries
- releases estrogen
LH
surge causes ovulation (egg release)
- results in the formation of corpus luteum
estrogen
thickens uterine lining (endometrium)
- slows FSH and LH
- stimulates FSH and LH pre ovulation
progesterone
produced by CL after ovulation
-thickens uterine lining
slows FSH and LH
- flow phase (menstrual)
days 0-4
Low estrogen and progesterone
- endometrium is shed by uterine contractions (bleeding
- FSH release begins follicular development
day 0-4
high FSH levels = stimulating follicle development.
low E & P so linings sheds
- follicular phase
-day 6-13
FSH from ant pit stimulates growth of ovarian follicles.
-dominant follicle makes estrogen
-Stops FSH (neg fed) to prevent other follicles from growing.
Thickens the uterine lining (endometrium).
day 6-13
FSH stimulates follicles to grow and produce E
which thickens the endometrium. FSH stops so other follicles dont grow (neg feedback)
- ovulatory phase
-day 14
- estrogen stimulates ant pit to secrete hormones (pos fed)
-Leads to an LH increase (and smaller FSH surge).
LH causes dominant follicle to release an egg (ovulation).
day 14
LH increase triggers ovulation.
Estrogen levels peak, and progesterone begins to rise.
- luteal phase
day 15-28
-Corpus Luteum Formed from a ruptured follicle.
-makes progesterone and some estrogen.
Thickens uterine lining.
Stops FSH and LH production.
Day 15-28
Corpus luteum makes E & P
P maintains endometrium and stops FSH & LH.
no fertilization = E & P drop
Oogenesis (Egg Development)
develops in follicles:
Each month, one follicle matures and releases an egg (ovulation).
Remaining follicle tissue becomes the corpus luteum, which secretes progesterone and estrogen.
Hormonal Control in Females
Hypothalamus secretes GnRH, stimulating the pituitary to release:
FSH: Stimulates follicle growth and estrogen production.
LH: Triggers ovulation and the formation of the corpus luteum.
If fertilization occurs:
Embryo implants, and hormones sustain the corpus luteum