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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Failure to have both testis (gonads) descend
cryptorchid
mare gestation
Jersey Cow
estrus
2. 265-285 days
Dairy Cattle Gestation
stag
dairy cattle pregnancy check
effects of BST
3. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
pelvis
cow ovulation
4 major reasons for culling dairy cows
estrous
4. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
pelvis
femininity of a heifer
Bull's fibro-elastic penis
humans: stress level vs sperm
5. The more stressed out the male is - the less sperm he is going to produce
leydid or interstitial cells
humans: stress level vs sperm
Dairy Cattle Gestation
Blood
6. Provide nourishment for the developing sperm
functions of progestrone
mare estrus
sertoli cells
penis sizes vs delivering methods
7. 19-23 (21) days
cow estrus cycle
cow estrus
Lutinizing Hormone in females
retractor muscles
8. Animals which have many estrous periods per year (ex: cow - sow)
Size of cow in relation to the amount of milk produced
visual evaluation (BSE)
polyestrous
mare gestation
9. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
burdizzo
Culls bulls earlier (2 reasons)
cremaster muscle
reason for seasonal breeding periods
10. 283 days
humans: stress level vs sperm
Blood
vulva
cow gestation
11. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
hormones
growth lost from castration methods (knife & band)
epididymis: definition - 3 parts - 4 functions
Grading choice
12. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
castration
age and castration
behavioral signs of estrus
vagina
13. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
cow estrus
retractor muscles
estrous
penis proper
14. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
vagina
growth lost from castration methods (knife & band)
feeding a high producing dairy cow
Hard
15. Days which have increasing daylight hours
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16. Milk ~305 days - dry 60 days prior to calving
effects of BST
ewe estrus cycle
Dairy Cattle milking schedule
vulva
17. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
Grading choice
ewe estrus
reason for seasonal breeding periods
uterus
18. Failure to have one testis (gonad) to descend
sow estrus cycle
functions of progestrone
dry-off time in dairy cattle
monorchid
19. Failure to have both testis (gonads) descend
cryptorchid
effects of estrogen
Sperm survival specs
pelvis
20. What helps regulate spermatogenesis?
cervix
1. more cost effective - 2. powdered milk is in excess production
testosterone
scrotum
21. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
femininity of a heifer
#1 cost in production
ewe's estrous cycle
pelvis
22. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
sertoli cells
Where livelihood is in agriculture
Dairy Cattle milking schedule
stag
23. (FSH) causes egg to mature in females
elastrator
seminiferous tubules
Follical Stimulating in females
what has to happen for males for copulation to occur
24. What makes the milk flow through the mammary glands?
Blood
Sperm growth rate
normal presentation of the fetus
Lutinizing Hormone in females
25. 30-38 hours after estrus cycle begins
sow ovulation
reasons for castration
things to check for in a breeding soundness exam (BSE)
Grading choice
26. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
Lutinizing Hormone in males
dairy cattle pregnancy check
4 major reasons for culling dairy cows
functions of progestrone
27. Male on one pin and female on other side
Lutinizing Hormone in males
vagina
van deferens
libido test (BSE)
28. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Follical Stimulating in males
penis sizes vs delivering methods
Follical Stimulating in females
29. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
dairy cattle pregnancy check
Jersey Cow
seminiferous tubules
oviducts
30. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
scrotal circumference (BSE)
van deferens
rectal palpation (BSE)
monorchid
31. Animals which have only one estrous cycle (ex: dog - fox)
Lutinizing Hormone in females
pelvis
monestrous
burdizzo
32. Why Dairy calves are fed powdered milk.
effects of BST
1. more cost effective - 2. powdered milk is in excess production
cow gestation
Reasons for gestation length being affected
33. 45-60 days after breeding; re-breed as required
mare's estrous cycle
dairy cattle pregnancy check
libido test (BSE)
Reasons for gestation length being affected
34. 19-23 (21) days
mare ovulation
monestrous
effects of BST
sow estrus cycle
35. 336 days
Dairy Cattle milking schedule
urethra
effects of estrogen
mare gestation
36. Way to know everything is alright with the breeding male
penis sizes vs delivering methods
1. more cost effective - 2. powdered milk is in excess production
purpose of Breeding Soundness Exam (BSE) for males
mare estrus cycle
37. To remove/separate testicles from animal's body before animal reaches puberty
castration
ewe estrus cycle
leydid or interstitial cells
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
38. Actual heat cycle (period)
Hard
estrus
accessory sex glands
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
39. Look for infection - split - and rupture of the penis
behavioral signs of estrus
Avg. bull specs
penis and prepuce observation (BSE)
scrotum
40. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
colostrum
Where livelihood is in agriculture
burdizzo
Bull's fibro-elastic penis
41. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
purpose of Breeding Soundness Exam (BSE) for males
mare estrus
Avg. bull specs
sow ovulation
42. Birthing process (termination of gestation)
cervix
sow estrus cycle
Parturition
pelvis
43. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
penis proper
~1 month
stag
normal presentation of the fetus
44. 1. brain function - 2. blood flow - 3. willing female
retractor muscles
leydid or interstitial cells
what has to happen for males for copulation to occur
why does the cow need fat deposits during pregnancy?
45. 283 days
organs used in spermatogenesis
cow gestation
semen evaluation (BSE)
kidney stones also called ________ ___________ can develop in the sigmoid flexure
46. When are steers and heifers weaned from bottle feeding?
penis sizes vs delivering methods
testosterone
purpose of Breeding Soundness Exam (BSE) for males
6-8 weeks
47. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
Blood
epididymis: definition - 3 parts - 4 functions
scrotal circumference (BSE)
hormones
48. 24 hours before end of estrus cycle
dry matter and water
mare ovulation
polyestrous
testosterone
49. ~305 days (altough often longer due to breeding difficulties)
Holstein Cow
Holstein Cow
Dairy Cattle Lactation (standard)
things to check for in a breeding soundness exam (BSE)
50. 14-19 (17) days
accessory sex glands
butterfat
ewe estrus cycle
things to check for in a breeding soundness exam (BSE)