Sorry for the pay wall on this but bottom line is, scientists have taken XY cells from the tail of an adult mouse, cultured them in a proper soup of growth factors and produced an oocyte which they then fertilized with mouse sperm, implanted the embryo in a surrogate and produced viable pups! #sexcell #fungibility #malecellsmakeoocytes #oocytes #mouse
https://www.nature.com/articles/d41586-023-00755-1