There was a relatively unexpected variation in the time of farrowing after MPA IVD withdrawal.
In conclusion, IVDs impregnated with MPA can delay parturition and avoid farrowing in weekends without having negative effects on the alive/total born piglets ratio.
Effect of PGF2[alpha] and neostigmine on induction of parturition, farrowing interval and litter survival in swine.
Increasing the predictability of cloprostenol-induced farrowing in sows.
When looking at the possible interactions between pregnancy and lactation housing, it can be seen in Table 5 that, when moved into farrowing crates, previously group-housed sows spent more time dog sitting and sternal lying, and less time standing and lateral lying than previously stalled sows.
For the rooting behavior, (Lammers and Lange, 1986) suggest the rooting behavior is one sign of nesting behavior in a farrowing crate.
Previous work has shown that a change from loose housing to confinement at farrowing may be more stressful than confinement throughout pregnancy and lactation (Vestergaard and Hansen, 1984).
There were fewer residual effects of pregnancy housing after farrowing, but EC sows still showed more dog-sitting than SC and GC sows.
In the other direction, the farrowing rate could be 65% (or even lower).
SIGNS OF SEASONAL INFERTILITY IN SOWS: * Decreased farrowing rate * Increased days from weaning to estrus Young sows are especially influenced by summer infertility.
To account for the less-than-perfect farrowing rates during the year, Levis calculated a seasonal coefficient to aid in setting breeding targets.
Realistic goals for attaining high PPSY records in a herd are: nonproductive days, <60; weaning age, <24 d; farrowing rate, >80%; litter size, >10.0 pigs born alive; pre-weaning mortality, <14%; mating/service, >2.0; and sow mortality, <8%.