China Sends Lab-Grown Embryos to Space to Study Early Development in Orbit

China’s Tianzhou‑10 cargo mission delivered roughly 7 tons of supplies to the Tiangong space station and carried two types of living stem‑cell–based “artificial embryos” to study early human development in microgravity. Representing 14–21 days after fertilization, the peri‑implantation and peri‑gastrulation embryos will be grown for about five days in orbit, then frozen and returned to Earth for analysis to assess how space radiation and zero gravity affect embryo development—an important step for potential off‑Earth reproduction—though the researchers emphasize these are embryo‑like and not viable human embryos.