Dairy Quiz Bowl - Reproduction & Genetics
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31 Terms
The lower segment of the oviduct closest to the uterus
isthmus
The large funnel-like structureon the open end of the oviduct
infundibulum
The structure that holds the uterus and ovaries in their proper position
broad ligament
The fertile life of a ovum after its release from the follicle
6-12 hours
The area that the fetus develops after the ovum is fertilized
the uterus
The structure through which the fetus receives all its nutrients
placenta
The normal range in length of the estrous cycle
18-24 days
The number of days between heat periods in dairy cows
21 days
Follicles develop in a wave-like pattern know as what?
The follicular wave
The name given to the largest follicle present on one of the ovaries
Dominant follicle
Duration of standing heat
2-12 hours (average 7)
Most common cause of cow not coming back into heat
pregnancy
Condition where the physical signs of heat are difficult to detect
silent heat
the most reliable sign of estrus
standing to be mounted
How many hourse after the onset of standing heat should a cow be artificially inseminated?
5-15 hours
The most popular semen package available
.5mil french straw
what is used to freeze and store semen?
liquid nitrogen
What is the combined effect of heat detection rate and conception rate
pregnancy rate
What is the average gestation length
276-292 days
Which cattle have the longest gestation period?
Brown swiss cattle
What hormone does the calf trigger in response to stress to initiate parturition
cortisol
what hormone is released prior to calving
relaxin
what is the normal birth position of a calf?
front feet first with the head between the legs
What is a calf that is born dead?
a still born
What is the main function of the testes in a male cow?
to produce sperm and male sex hormones
What part of the male reproductive system stores sperm?
epididymus
What hormones stimulate sperm production>
Follicle stimulating hormone (FSH) and luteinizing hormone (LH)
What hormone is important to male reproduction
testosterone
What is the number one reason for culling?
reproductive failure
When is the incidence of metritis, endometriosis, and retained placenta the highest?
Summer
What are the leading causes of anestrus?
poor nutrition and uterine infections