Development of parthenogenetically activated pig diploids cultured in PZM3, PZM3 supplemented with glucose (PZM3+G), PZM supplemented with glucose (PZM+G) or fructose (PZM+F) or PZM from 4 h to 216 h after electrostimulation. Trials were repeated at least three times in each experimental group, and the total numbers of diploids for the analysis were 86, 34, 33, 69 and 27 for those cultured in PZM3, PZM3+G, PZM+G PZM+F and PZM, respectively. The different small letters (a–c) indicate significant differences in the proportions of diploids that developed to the most advanced stage at each observation point among the experimental groups (P < 0.05). The different capital letters (A–C) indicate significant differences in proportions of diploids that developed to the blastocyst and hatching/hatched blastocyst stages among the experimental groups (P < 0.05).