Summary and Implications
Pigs were exposed to heat stress (HS) and thermoneutral (TN) conditions in-utero. Post-weaning, they were exposed to acute heat-stress for a 24-hour period, and differences in physiological response between in-utero treatment groups were determined. Our results indicated that in-utero heat-stress had no effect on core body temperature; however the HS group had a larger cumulative difference (~50%) between rectal and skin temperatures compared to TN pigs. Preliminary, this provides evidence suggesting pigs exposed to in-utero HS may have an altered tolerance to post-natal HS.
Iowa State University
Johnson, Jay; Boddicker, Rebecca; Sanz Fernandez, Maria Victoria; Ross, Jason W.; Baumgard, Lance H.; and Selsby, Joshua T.
"Gestational Thermal Environment Alters Postnatal Response to Heat Stress,"
Animal Industry Report:
AS 658, ASL R2738.
Available at: http://lib.dr.iastate.edu/ans_air/vol658/iss1/70