9B: Estrus cycle Flashcards

1
Q

Estrus cycle – 21
Proestrus – 2
Estrus – 18 hours (12-24 hours)
Ovulation – 10-16 hrs
Metestrus – 2
Diestrus – 16

A

COW

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2
Q

Estrus cycle – 20
Proestrus – 2
Estrus – 18 hrs (12-24 hrs)
Ovulation – 10-16 hrs
Metestrus – 2
Diestrus – 15

A

HEIFER

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3
Q

Estrus cycle – 2-3x / year
Proestrus – 5-9
Estrus – 7-9
Ovulation – 3 days after onset of estrus
Metestrus – 2
Diestrus – variable

A

BITCH

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4
Q

Estrus cycle – 17
Proestrus – 2
Estrus – 1.5
Ovulation – last 1/2 of estrus
Metestrus – 2
Diestrus – 11.5

A

EWE (sheep)

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5
Q

Estrus cycle – 21
Proestrus – 2
Estrus – 3
Ovulation – 21-36 hours after onset of estrus
Metestrus – 2
Diestrus –14

A

DOE (deer)

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6
Q

Estrus cycle – 21
Proestrus – 2
Estrus – 3
Ovulation – 21-36 hours after onset of estrus
Metestrus – 2
Diestrus –14

A

PIG

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7
Q

Estrus cycle – 14-21
Proestrus – 1-3
Estrus – 5-10
Ovulation – 24-32 hours after LH surge
Metestrus – 2
Diestrus – variable

A

CAT

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