MODULE 1 Flashcards
(25 cards)
What is the normal duration of the menstrual cycle?
28 days
What are the two ovarian phases, and which occurs first?
follicular and luteal phases,
- follicular phase occurring first
Which phase of the ovarian cycle is generally responsible for the cycle being longer or shorter?
follicular phase account for cycle length differences.
- The luteal phase is fixed at 14 days in a majority of women
During the follicular phase, what hormonal changes occur in the pituitary???
FSH
During the follicular phase, what hormonal changes occur in the ovary??
Estrogen
Inhibin
What occurs in the uterus during the follicular phase?
proliferation of the endometrial lining
- 2 to secretion of estrogen
What happens to cause ovulation at the end of the follicular phase?
plasma estrogen reaches a critical level; inc
Negative feedback to positive feedback
How does fertilization prevent degeneration of the corpus luteum?
developing embryo will synthesize human chorionic gonadotropin (hCG), which acts similarly to LH and maintains the corpus luteum.
How does the corpus luteum function in the maintenance of pregnancy?
first 6 weeks of pregnancy the corpus luteum is the primary producer of estrogen and progesterone, hormones required for the continuation of pregnancy.
Hormone secreted by corpus luteum
ESTROGEN and PROGESTERONE
Where does fertilization occur?
Ampulla of the Fallopian tube
STIMULATES MATURATION OF PRIMARY OOCYTE IN AN IMMATURE FOLLICLE
FSH
STIMULATE SECRETION OF LH
HIGH LEVELS OF ESTROGEN
What happens to patients if estrogen secretion is uncontrolled by progesterone?
woman will experience irregular menses
Progesterone actions’’
- suppress follicular maturation on the ipsilateral ovary
- thermogenic activity [# basal body temp
- endometrial maturationk
Progesterone peak at??
8 days after ovulation (D22 )
first sign of ovulation
subnuclear vacuoles and pseudostratification??
What hormone initiates the menstrual cycle?
GnRH
stimulate the production of FSH and LH
triggers of follicular development.
GDF9 and BMP15
Hormone that maintains pregnancy???
Progesterone
Hormones released by Granulosa Cells???
Progesterone and Inhibin
It occurs 34 to 36 hours before the release of the ovum
gonadotropin surge
d/t inc. Estrogen
Develops from the remains of the dominat or graafian follicle in a process called LUTEINIZATION.
Corpus Luteum
It Correspond to follicular phase of the ovarian cycle
Proliferative phase
