Sperm have been made in the laboratory and used to father healthy baby mice in a pioneering move that could lead to infertility treatments. The Chinese research took a stem cell, converted it into primitive sperm and fertilised an egg to produce healthy pups. The study, in the Journal Cell Stem Cell, showed they were all healthy and grew up to have offspring of their own.
http://www.bbc.com/news/health-35658650
Study: http://www.cell.com/cell-stem-cell/fulltext/S1934-5909(16)00018-7
http://www.bbc.com/news/health-35658650
Study: http://www.cell.com/cell-stem-cell/fulltext/S1934-5909(16)00018-7