highly significantp < 0.01
Under elevated temperature (41 °C for the first 12 h and 38.5 °C for the second 12 h), RA supplementation at the 7.55 nM level to in vitro embryo production exhibited highly significant ( p < 0.01) cleavage rates compared to controls (38.5 °C for 24 h) in bovine species [ 40 ].