Lab-grown human sperm advances in mice, but full maturity remains elusive
Researchers transplanted human iPS-derived immature cells into a mouse kidney pouch, where they self-organized into early sperm-supporting structures and developed into spermatogonia after six months. While this marks progress toward lab-made sperm, the cells did not mature yet, signaling further hurdles. The work offers a new avenue to study early human sperm development and infertility, though clinical applications are far off and raise ethical questions about future reproductive technologies.
