Fig. 3: Generation of healthy monkeys from split embryos.

a Post-implantation development of monkey control and split embryos. b An ultrasound image showing a surrogate uterus with a gestational sac containing a representative 25-day-old fetus (indicated by the yellow dashed box). The white arrowhead points to the fetus. Scale bar, 1 cm. c, d The height and weight of newborn cynomolgus monkeys derived from split embryos were continuously monitored from birth until 360 days of age. Data are displayed as mean ± SEM. White and black dashed lines indicate the mean values of split embryos and control embryos, respectively. The shaded area represents the 95% confidence interval, reflecting the variability of the data (split embryos, n = 5; controls, n = 7). The upper and lower edges of the shaded area represent the maxima and minima, respectively. The statistical analysis utilized multiple two-tailed t-tests without adjustment. *p value < 0.05, **p value < 0.01. Source data are provided as a Source Data file.