MODULE 1 Flashcards
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