16. female hormonal control of reproduction and infertility Flashcards
1
Q
how long is the ovulatory phase?
A
36hrs
2
Q
4 phases of menstrual cycle
A
- menstruation
- follicular
- obuvalory
- luteal
3
Q
during ovulation which 2 hormones increase and which decrease?
A
increase - Oestrogen and progesterone
decrease - LH and FSH
4
Q
2 functions of oestrogen
A
- endometrial proliferation
2. maturation of vaginal epithelium
5
Q
describe feedback of oestrogen
A
follicular = negative feedback ovulatory = positibe feedback
6
Q
describe pathway of how oestrogen is produced
A
- hypo - GnRH
- Ant pit - LH and FSH
- ovary follicle - oestradiol
7
Q
what produces inhibin?
A
follicle
8
Q
what produces progesterone?
A
corpus luteum
9
Q
function of progesterone
A
- increase in body T
2. thick cervical mucus secretion
10
Q
what occurs during follicular phase
A
- FSH causes growth of follicle
- follicle secretes oestrodiol
- inhibin + oestrodiol cause negative feedback on FSH
- FSH decreases
11
Q
what occurs during the ovulatory phase
A
- oestrdiol causes positive feedback
- LH surge
- oocyte maturation
- release of ovum
12
Q
what occurs during the luteal phase?
A
- follicles become corpus luteum
- CL secrete oestraoil and progesterone
- progesterone maintains endometrium
- CL involutes by macrophage
- oestradiol + prog decline
- menstruation
- loss of negative feedback
- FSH rises
13
Q
what does the ovum secrete (fertilised)?
A
human chorionic gonadotrophin (hCG)
14
Q
role of hCG?
A
maintains Corpus luteum
15
Q
what is precocious puberty
A
puberty before age of 8
