Estral cycle

Question 1

How long does the Mice’ estral cycle last?

Answer 1

4-5 days

Question 2

Which characteristic phases doe the cycle consist of?

Answer 2

Proestrus
Estrus
Metestrus
Diestrus

Question 3

Ho can the stages of the estral cycles be determined?

Answer 3

By vaginal cytology

Question 4

Other changes than in sexual organs?

Answer 4

Behavioural changes

Question 5

Animals can be divided into?

Answer 5

• polyestrus –> estrous cycles throughout the year ( cow, pig, mouse, rat)
• Seasonally polyestrus –> have multiple cycles, but only during a specific period of the year ( horse, sheep, goat, deer)
• Monoestrus –> only one cylcle a year (wolf, fox, bear)

Question 6

How can the phase of the reproductive cycle be determined?

Answer 6

By assessing the presence of leukocytes and nucleated and cornified epithelial cells

Question 7

DIestrus?

Answer 7

Mostly polymorphonuclear leukocytes and some epithelial cells –> functional corpus luteum

Question 8

Proestrus?

Answer 8

Mostly nucleated and cornified epithelial cells, can be some polymorphonucleated leukocytes

Question 9

Estrus?

Answer 9

Mostly cornified epithelial cells. Can se a few nucleated cells if it is early estrus. (Mating period)

Question 10

Metestrus?

Answer 10

cornified epithelial cells, and leukocytes, some nucleated epithelial cells. –> formation of corpus luteum