Prediction of milestone labels within organoid scRNA-seq and snRNA-seq data. Based on the milestones identified in the human fetal scRNA-seq data, the fraction of cells representing these milestones within both the pooled organoid scRNA-seq data (days 10, 14, and 24 of batches 1, 2, and 3) and the snRNA-seq data (days 10, 12, and 14 of batch 3) were analyzed and plotted as a heatmap for the different days along the protocol that were analyzed. See also Figure S2.