Additional file

The placenta plays a key role in fetal growth and function to transport nutrients that are vital to the fetus. Heat stress (HS) impairs placental function in cows, affecting fetal development. There is limited information on the effects of HS on the placenta of heat-tolerant and -sensitive dry cows. The objective of this study was to assess differences in placental development and placental proteomics in heat-tolerant and -sensitive dry cows.