For the first time scientists have managed to convert human bone marrow tissue into immature sperm cells. It is an amazing discovery that may help both men and women grow their own sperm in the laboratory.

The success they reached will be aimed at overcoming fertility and helping a large number of people who had problems conceiving. It may even able two women to have their own own biological daughter.

Researchers from the University of Newcastle upon Tyne in Britain, took bone marrow from male volunteers and isolated adult stem cells called mesenchymal stem cells. They grew them in a culture containing vitamin A and coaxed them into becoming immature sperm cells known as spermatogonial stem cells.

Their next step is to make these spermatogonial stem cells to progress to mature sperm.

Experiments done with mice showed this was possible as they succeeded in converting embryonic stem cells from mice into sperm and produced seven mice pups, six of which lived into adulthood.

The researchers reported that it would certaimly take another three to five years of experiments to obtain fully developed human sperm and that they are hoping their findings will turn into successful infertility treatment.