Blastocyst rates (% of oocytes) of oocytes from Nelore (N) and Holstein (H) cows, fertilized with semen from Nelore (N) or Angus
(A) bulls, and maintained at 39 ◦C or subjected to a heat shock of 41 ◦C for 12 h at 96 h post-insemination. Interactions breed of
bull×temperature and breed of cow×temperature.