Synthetic mouse embryos created from stem cells - without sperm, eggs, or a uterus
it from below by the microscope's soft glow, the translucent mouse embryos looked exactly as they should. On day 3 they began to elongate, from spheres into cylinders. On one end, the neural tube started to fold around day 6, on the other a tail began to bud.
https://www.statnews.com/2022/08/01/synthetic-mouse-embryos-created-from-stem-cells-without-sperm-eggs-uterus/