Estrus synch Flashcards

1
Q

Proestrus
-hormone activity
-time frame

A

-decreasing progesterone
-increasing estrogen
-1-3 days

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2
Q

estrus
-hormone activity
-time frame

A

-highest level of E2
-spike in LH for ovulation
-<1 day(ends with ovulation)

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3
Q

metestrus
-hormone activity
-time frame

A

-increase P4(formation of CL)
-decrease E2, FSH, LH
-5 days

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4
Q

Diestrus
-hormone activity
-time frame

A

-highest level of P4
-low E2, FSH, LH
-longest phase

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5
Q

sections of estrous

A

-proestrus
-estrus
-metestrus
-diestrus
-proestrus(cycle restarts)

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6
Q

2 phases of estrous cycle

A

-follicular
-Luteal

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7
Q

sections in follicular phase

A

-proestrus
-estrus

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8
Q

sections in luteal phase

A

-metestrus
-diestrus

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9
Q

polyestrous

A

no defined breeding season/multiple estrous cycles throughout the year
Ex: cow, sow, rat

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10
Q

seasonally polyestrous

A

has an anovulatory period but multiple estrus cycles during distinct seasonal periods
Ex: Sheep(short day), horse(long day)

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11
Q

which animal does not have a 21 day estrous cycle, how long is it?

A

ewe, 17 days

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12
Q

two primary causes of low reproductive efficiency/performance

A

-failure to detect heat
-errors in heat detection

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13
Q

consequences of improper heat detection

A

-longer calving intervals(lower lifetime milk production, fewer claves)
-decreased conception rates(wasted semen)
-accidental culling of normal animals
-inseminating pregnant females mistakenly identified in heat may cause abortion

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14
Q

cow estrus detection

A

-30 minutes in the morning 30 minutes in the evening
-standing to be mounted
-swollen vulva
-clear mucus secretion

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15
Q

am/pm rule

A

cows seen in heat in the morning will be inseminated in the evening, vice versa

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16
Q

ewe estrus detection

A

-restlessness (“seeking” ram)
-urination in the presence of ram

17
Q

Teaser animals

A

in tact males incapable of impregnating female that identify females in heat.
must have strong libido

17
Q

marking aids

A

-chinball marker
-heat-mount detector patches
-marking harnes

17
Q

mare estrus detection

A

-increased locomotion/tail erected(“flagging”)

17
Q

heatwatch

A

-placed on the tailhead of females
-records when female is mounted
-software failure can present as no females in heat

17
Q

sow estrus detection

A

-mild restlessness
-immobilization in response to back pressure
-swollen vulva

18
Q

boar exposure

A

-physical presence(sound, smell) of boar
-gilts exposed between 160-180 days, start cycling within 21 days
-combined with PG600 estrus starts in 5-10 days

19
Q

matrix

A

-orally active progesterone
-feed for 14 days, estrus 4-9 days after removal from feed
-used for sows and gilts

20
Q

effective weaningprocedure for pigs

A

-wean piglets 21 days after birth
-come in heat 4-10 days

21
Q

medications for progesterone

A

-CIDR
-MGA(feed)

22
Q

medications for PGF2a

A

-Estrumate
-Prostamate
-Lutalyse

23
Q

medications for GnRH

A

-Fertagyl
-Factrel
-Cystorelin