Estrus cycle

Question 1

Luteal phase

Answer 1

CL formation to regression,

Question 2

Luteal phase stages

Answer 2

Metestrus, diestrus

Question 3

Follicular phase

Answer 3

CL regression to ovulation

Question 4

Follicular phase stages

Answer 4

proestrus, estrus

Question 5

Proestrus

Answer 5

follicular phase, CL regression, progesterone levels decrease
Makes the follicle create more estradiol
LH pulse increase, estradiol increase, repeat (positive feedback loop) tonic center regulates pulses

Question 6

Estrus

Answer 6

estradiol has reached its peak, surge center is tripped and releases GnRH surge
Causes an LH surge which causes the cow to ovulate

Question 7

Metestrus

Answer 7

luteal phase (early luteal development), ovulation, increase in progesterone levels

Question 8

Diestrus

Answer 8

ends due to luteolysis, maximal progesterone levels, CL growth and maintenance, longest stage of estrous cycle

Question 9

Progesterone

Answer 9

Maintains pregnancy

Question 10

Estradiol

Answer 10

sexual behavior, increased GnRH secretion

Question 11

Follicle produces

Answer 11

Estradiol

Question 12

Length of the estrous cycle

Answer 12

21 days average

Question 13

Standing estrus (heat) length

Answer 13

12-18 hours average

Question 14

Ovulation

Answer 14

Approximately 30 hours after the beginning of estrus

Question 15

Order of stages

Answer 15

Estrus, metestrus, diestrus, proestrus

Question 16

Follicular development stages

Answer 16

Primordial, primary, secondary, tertiary, mature

Question 17

Three phases of follicles

Answer 17

Recruitment, selection, dominance

Question 18

Atresia

Answer 18

Follicular regression

Question 19

Follicle waves occur during the

Answer 19

estrus cycle, pregnancy, post partum anestrus

Question 20

Amount of time it takes for CL to reach mature size

Answer 20

10 days

Question 21

CL produces

Answer 21

Progesterone

Question 22

Progesterone function

Answer 22

Inhibits estrus and subsequent ovulation