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FA Therio > 1: Bovine Estrous & Synch > Flashcards

1: Bovine Estrous & Synch Flashcards

1
Q

What is the source of estrogen?

A

Growing follicles

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2
Q

When is estrogen at its highest level?

A

At estrus; declines following ovulation

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3
Q

Effect of estrogen:

A

Triggers GnRH/LH surge

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4
Q

Source of Progesterone:

A

CL

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5
Q

When are progesterone levels the highest?

A

Diestrus

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6
Q

What is the effect of progesterone?

A

Quiets hypothalamus/AP
Prepares for pregnancy

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7
Q

What product is used in synch protocols to administer progesterone?

A

CIDRs

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8
Q

How is progesterone used in synch protocols?

A

Causes negative feedback on pituitary gland. Lengthens luteal phase.
Inhibits estrus and PREVENTS OVULATION

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9
Q

What is the source of LH?

A

AP

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10
Q

When is LH at its highest?

A

Surges in response to GnRH (E2 spike)

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11
Q

What effect does LH have?

A

Stimulates ovulation of dominant follicle

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12
Q

How is LH used in synch protocols?

A

Stimulated with GnRH

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13
Q

How is FSH used in synch protocols?

A

Stimulated with GnRH

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14
Q

What is the source of FSH?

A

AP

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15
Q

When is FSH highest?

A

Beginning of the follicular wave

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16
Q

What is the effect of FSH?

A

Starts the follicular wave

17
Q

What is the source of PGF?

A

Endometrium

18
Q

When is PGF highest?

A

End of diestrus

19
Q

What is the effect of FSH?

A

Starts follicular wave

20
Q

What products are used in synch protocols to administer GnRH?

A

Cystorelin, Factrel

21
Q

How is GnRH used in synch protocols?

A

Stimulates LH/FSH release
If CL: resets follicular wave
No CL: triggers ovulation

22
Q

What is the effect of GnRH if it is given at the beginning?

A

(CL Present)
Resets follicular Wave

23
Q

What is the effect of GnRH if it is given at the end?

A

(No CL)
Triggers ovulation

24
Q

What products are used in synch protocols to administer PGF?

A

Dinoprost, Lutalyse

25
Q

How is PGF used in synch protocols?

A

Lyses CL, shortens luteal phase

FA Therio (7 decks)

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