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Repro Ch. 5

Across
Length of estrus is 22 days.
The periods of the estrus cycle are also called. (two words)
The role that daylight plays on the breeding of horses.
A series of estrus cycles (two words).
Length of estrus is 17 days.
The number of periods in the estrus cycel
The age that estrus with ovulation is first expressed.
The absence of cycling.
Down
One period of estrus each year.
This occurs two -three times during each cycle in cows and ewes (two words).
Considered as "long day breeders".
Length of estrus is 20 days.
The drop of what moves the hypothalamus from its negative feedback inhibition.
The length of preovulatory surge of LH is 6-10 hours (not ewe)
The length of preovulatory surge of LH is sometimes days.
Is determined to start by genetics and the environmental factors.