The effects of early life thermoneutral (ELTN), early life heat stress (ELHS), and early life cold stress (ELCS) conditions on (A) piglet respiration rate by day of age, (B) piglet skin temperature (TS) by day of age, (C) piglet rectal temperature (TR) by day of age, and (D) sow TR by day of age. Error bars indicate ± 1 SE. An asterisk (*) on the legend indicates overall early life thermal stress (ELTS) treatment differences (P ≤ 0.05). #,^Symbols indicate overall day of age differences (P ≤ 0.05). a,bLetters indicate ELTS treatment by day interactions (P ≤ 0.05).