Has it become possible to obtain sperm "artificially"?

An important research from the point of view of fighting against infertility was conducted by biotechnologists at Kyoto University (Japan), who had used mice stem cells to create sperm in the laboratory. The scientists, headed by Professor Mitinori Saito, did the following: they took stem cells from mice embryos and combined them with special genes, so that «the precursor cell» was gained, which is able to grow up either in the egg or the sperm. Obtained precursor cells were transplanted into testicles of infertile male mouse, and after 10 days normal sperm was formed there. Scientists took this sperm from the testicles of male mice and made in vitro fertilization, in a result of which healthy offspring was born. Later, this offspring had got their own children, which allowed researchers to believe that sperm received from stem cells was healthy. Now Japanese biologists are trying to get mice egg from stem cells.

By the way, it is already the second phase of the experiment: during the first one, biologists had injected only one gene into stem cells, whereas now scientists had used three types of protein at once, which improved the result by 5 times. Professor Saito said, "The new method is expected to give a key for an explanation how cells are involved in reproduction". The researchers hope that the new method will pave the way for the development of new treatments for infertility.

Indeed, in case if scientists were able to use tested method on an adult human, technology could be used in the fight against male infertility: as experiments have shown, stem cells in addition with several genes, can overcome infertility, at least at male mice. Of course, the potential of this method is enormous, however, before speaking about using this technology for the treatment of men’s infertility, I suppose, there should be studies and experiments carried out of a higher level, which will take much more time.