Effects of alpha-linolenic acid (ALA; 50 μM) on amount of glucose during in vitro maturation of porcine oocytes. Data show glucose consumption per cumulus–oocyte complex (COC) in each treatment group. Data are the mean ± SEM. Asterisks indicate differences between fresh medium and treatment groups at 22 h and 44 h after in vitro maturation (p < 0.05).