Lecture 1 with lab lect

Question 1

Where do the hormones LH and FSH get released from?

Answer 1

Anterior pituitary -> to follicle

Question 2

What releases estrogen and what does it have an effect on?

Answer 2

Follicle releases estrongen, goes to Anterior pituitary for negative feedback for FSH
Goes to surge center of brain as positive feedback

Question 3

What hormone stimulates the anterior pituitary to release LH and FSH?

Answer 3

The hypothalamus releases GnRH

Question 4

What are the 4 important reproductive hormones?

Answer 4

Estrogen
Progesterone
Lutealizing hormone
Follicle stimulating hormone

Question 5

What stage does estrogen rise in?

Answer 5

Proestrus

Question 6

What happens to estrogen when ovulation occurs?

Answer 6

It is steadily decreasing

Question 7

What causes ovulation to occur?

Answer 7

LH surge

Question 8

What hormones are active during anestrus?

Answer 8

FSH

Question 9

How long does average proestrus last in a dog?

Answer 9

9 days

Question 10

Estrus?

Answer 10

9 days

Question 11

What is happening to progesterone during estrus?

Answer 11

Increasing steadily

Question 12

How long does the average Diestrus last in the dog?

Answer 12

50 days

Question 13

What can we say we DO know if we see elevated P4?

Answer 13

The dog has ovulated in the last 2 months.

Question 14

What marks anestrus? How long is it?

Answer 14

progesterone drops down to <1ng/ml - lasts ~6 mo

Question 15

What hormonal change is important in late stage proestrus?

Answer 15

Progesterone increase

Question 16

What hormonal change is important in late stage proestrus?

Answer 16

Progesterone increase

Question 17

What is the best indicator or estrus?

Answer 17

LH surge

Question 18

T/F Dogs develop a CL prior to ovulation?

Answer 18

T

Question 19

What type of oocyte is ovulated in dogs?

Answer 19

Primary (needs second division before fertilization can occur)

Question 20

When can fertilization occur in a dog?

Answer 20

2 days after ovulation (and lasts 2 days)

Question 21

T/F the bitch has serum P4 levels during diestrus which are the same regardless of being bred or not and regardless of pregnancy or not.

Answer 21

TRUE

Question 22

What is the scientific name for false pregnancy?

Answer 22

Pseudocyesis

Question 23

What causes the development of mammary glands in late gestation AND late diestrus in some dogs?

Answer 23

Decline in progesterone

Question 24

Feline reproductive facts

Answer 24

long day, seasonally polyestrus, induced ovulators, P4 comes from CL and placenta, Super-fecundation (multiple dads). Super-fetation (different ages in one litter)

Question 25

If a queen is in estrus but not mated, what happens?

Answer 25

The estrogen levels ossilate and they go in and out of proestrus to estrus until they are stimulated to ovulate

Question 26

what is a semi-quantitative estrogen assay used in bitch estrus evaluation?

Answer 26

Vaginal cytology

Question 27

What are the vaginal smear cells like during anestrus?

Answer 27

Parabasal cells (estrogen low)

Question 28

Vaginal cytology cells in proestrus?

Answer 28

intermediate cells (rising estrogen)

Question 29

Vaginal cytology cells in estrus?

Answer 29

Partially cornified cells (rising P4)

Question 30

Vaginal cytology cells in diestrus?

Answer 30

Parabasal cells again.