Oogenesis, Uterine and Ovarian Cycle Flashcards Preview

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Flashcards in Oogenesis, Uterine and Ovarian Cycle Deck (19)
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1

_____ is ovam production, beginning at birth and ending at menopause

Oogenesis

2

_____ are stem cells in females that complete division between 3rd and 7th month of fetus development

Oogonia

3

Oogonia produce daughter cells called?

primary oocytes

4

Primary ooctyes only proceed to prophase of Meiosis 1 and then halts until

a female reaches puberty

5

When a female reaches puberty, what hormone triggers the Ovarian Cycle to begin?

FSH

6

Each female is born with ______ follicles, by puberty they have _______ follicles

2 million, 400,00

7

Eggs degenerating or atresia happens at?

menopause

8

The Ovarian Cycle has 2 phases

Follicular Phase (preovulatory)
Luteal Phase (postovulatory)

9

The Ovarian Cycle has how many steps?

6

10

FSH stimulates primordial follicles, causing it to develop into primary follicles

1) Formation of Primary Follicles

11

Follicle wall thickens and follicular fluid is produced causing expansion and division of inner and outer layer of follicles

2) Formation of Secondary Follicles

12

This occurs between day 10-14 of cycle. LH levels begin to increase, causing oocyte (secondary ooctye) to complete meiosis 1 and stops after metaphase of meiosis 2

3) Formation of Tertiary Follicle

13

Tertiary follicle releases secondary oocyte to be released from ovary and into uterine tube

4) Ovulation

14

The now empty tertiary follicle creates the corpus luteum due to increase in LH, the corpus luteum produces hormones called progestins which prepares uterine wall for pregnancy

5) Formation of the Corpus Luteum

15

12 days after ovulation, if fertilization did not occur, progesteron and estrogen levels decrease amd fibroblasts destroy corpus luteum leaving scar tissue called corpus albicans. The End of the ovarian cycle

6) Degeneration of Corpus Luteum

16

The Uterine Cycle

series of repeated changes to endometrium every 28 days
Includes Menses, Proliferative Phase, and Secretory Phase

17

the functional zone is degenerated, "spiral arteries" constict which reduces bloodflow to the area causing reduction of oxygen and nutrients. Arteries finally rupture and dying tissue sloughed off. Lasts 1-7 days.

Menses

18

epithelial cells of the basilar zone starts to restore the function zone

Proliferative

19

the endometrial glands enlarge and accelerate secretion and growth. "spiral arteries" grown and spiral though the functional zone. This phase lasts as long as corpus luteum

Secretory phase