It appears that men are now an endangered species. Scientists in China recently grew mice sperm in a lab and successfully used them to fertilize mice eggs. The baby mice grew into adulthood and survived. More research is being conducted to determine if the process can be replicated in humans.
The complex process was laid out in the scientific journal Cell Stem Cell and is titled Complete Meiosis from Embryonic Stem Cell-Derived Germ Cells In Vitro. The research is expected to help couples affected by male infertility as well as the same sex couples.