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Current strategies and technologies for reproductive management of gilts and sows -Banff 2017

Posted in: Pork Insight Articles, Production, Uncategorized by admin on May 8, 2017


Estrus synchronization by controlling the luteal phase of the estrous cycle

  • Accurate daily dosing of altrenogest  with gilts receiving 15mg/day and sows 20mg/day for 18-20 days
  • inaccurate administration leads to an increase in follicular cysts

Stimulation or controlling follicular development 

  • Pregnant mare serum gonadatropin (PMSG) contains the appropriate FSH/LH ratios to stimulate follicular growth
  • Dosing ranges from 500-100 IU

Induction of puberty in gilts

  • PMSG induces estrus in 50-90% of prepubertal and peripubertal gilts within five days
  • The best response occurs when gilts are within 20-30 days of natural puberty
  • 30% do not display signs but do ovulate
  • 30% of those exhibiting estrus have irregular return to a subsequent estrus

Follicle stimulation after estrus synchronization with altrenogest in gilts

  • Altrenogest 14 days followed by a follicle stimulator 24 hours after the last feeding of Altrenogest synchronizes estrus in gilts

Follicle stimulation in weaned sows

  • Triggering follicular growth with PMSG at weaning results in a more uniform population of follicles and increases the percentages of sows in estrus within 5 days

Induction of ovulation

  • Mature follicles are simultaneously induced to ovulate with a gonadotropin of predominantly LH activity

Control of farrowing

  • Successful induction require treatment within 2 days of normal expected farrowing date

Current strategies and technologies for reproductive management of gilts and sows -Banff 2017

 
 
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