Lecture 4: Preparation for Pregnancy/Ovulation Flashcards Preview

COB Embryology > Lecture 4: Preparation for Pregnancy/Ovulation > Flashcards

Flashcards in Lecture 4: Preparation for Pregnancy/Ovulation Deck (17):
1

Describe the composition of cervical mucous during ovulation

Thinnest around this time

2

List the three stages of the ovarian cycle

Follicular phase, Ovulation, Luteal phase

3

List the three stages of the endometrial cycle and when each occurs

Menstrual phase (Day 1-4), Proliferation phase (Day 4-14), Secretory phase (Day 15-28)

4

When does the follicular phase occur and what are the major events?

Days 1-14 of menstrual cycle; development of mature Graafian follicle and secondary oocyte

5

Which of the following is primarily responsible for ovulation?

A. Rise in levels of FSH
B. Secretion of progesterone
C. Synthesis of testosterone
D. Sharp rise in levels of LH

D. Sharp rise in levels of LH

6

When does ovulation occur? What are the major events?

Day 14 of menstrual cycle; egg is released from Graafian follicle, thecal cells secrete progesterone

7

What is the significance of the luteal phase?

Corpus Luteum formed from theca and granulosa cells

8

What is the fate of the corpus luteum if fertilization does not occur?

Inhibin causes its regression; it's replaced with scar tissue resulting in the formation of the corpus albicans

9

What occurs during the menstrual phase?

Endometrial build up sloughs off, resulting in menstrual flow

10

What is the significance of the spiral arteries during the menstrual phase?

Menstruation begins with vasoconstriction of spiral arteries supplying endometrium

11

What causes the vasoconstriction of spiral arteries?

Prostaglandins

12

What occurs during the proliferation phase?

Endometrial growth increases thickness, estradiol increased

13

What occurs during the secretory phase?

Estrogen levels decrease, endometrial growth stops. Mucous glands develop and begin secretion; rise in progesterone

14

What is the ovulated product?

Ovum at Metaphase II, 1st polar body, ZP, corona radiata, expanded cumulus oophorus

15

Fertilization age

Dates age of embryo from time of fertilization

16

Menstrual age

Dates embryo from start of mother's last menstrual period; two weeks greater than fertilization age

17

What is the result of proliferation of residual theca and granulosa cells following the luteal phase?

A. Placenta
B. Corpus luteum
C. Corpus abicans
D. Follicle

B. Corpus luteum