"Modeling post-implantation stages of human development into early organogenesis with stem-cell-derived peri-gastruloids" https://www.sciencedirect.com/science/article/pii/S009286742...
"Pluripotent stem cell-derived model of the post-implantation human embryo" https://www.nature.com/articles/s41586-023-06368-y
"Transgene-Free Ex Utero Derivation of A Human Post-Implantation Embryo Model Solely from Genetically Unmodified Naïve PSCs" https://www.biorxiv.org/content/10.1101/2023.06.14.544922v1
"Post-gastrulation synthetic embryos generated ex utero from mouse naive ESCs" https://www.cell.com/cell/pdf/S0092-8674(22)00981-3.pdf
This last paper uses a very interesting "roller-culture" system where mouse embryos are removed from the uterus and grown in test tubes.