Swine 7 Flashcards
How do we get gilts cycling?
Begin boar exposure at 20 weeks and record HNS
What is the optimal breeding parameters for most commercial breeds?
300-330 lbs
29-34 weeks of age
In their 2nd estrus
Need 2 of the 3 parameters
What estrus should gilts be bred on?
2nd estrus or later
Excessive _____ will impact cycling of gilts.
ammonia
What can cause farrowing rate to be too low?
Failure to conceive or maintain pregnancy
What boar factors can result in conception failure?
Age, disease, genetics, season, temperature, and usage
What gilt/sow factors can lead to conception failure?
Lactation length, wean-serve interval, parity, mycotoxins, disease, and temperature
What management factors can lead to conception failure?
Matings/service - 2 matings>1 mating Mating quality - thin vs. normal Mating timing - breeding too early/late Homo/heterospermic - single sire vs pooled Natural vs. AI
What environmental factors can lead to pregnancy failure?
Movement, mixed/stress, season, temperature
What is the fall out rate?
% of females confirmed pregnant (RTU) but then are found not pregnant later in gestation
What feed factors can lead to pregnancy failure?
Energy intake and mycotoxins
What gilt/sow factors can lead to pregnancy failure?
Disease and endocrine dysfunction
At what point of gestation do slips/early abortions occur?
Between days 10-35 of gestation
At what point of gestation do mummies occur?
35 days up until 110ish?
What management factors can lead to low total born pigs?
Matings/service, mating quality, mating timing, heterospermic?, natural vs. AI, pen vs. hand
