Research aimed at overcoming infertility has managed to convert human bone marrow into immature sperm. Professor Nayernia of the University of Newcastle in Britain led a team which took male bone marrow and isolated adult stem cells.
These stem cells can turn into a variety of tissues. The scientists nutured them in a culture containig vitamin A from which grew the immature sperm cells.
"Our next goal is to see if we can get the spermatogonial stem cells to progress to mature sperm in the laboratory," stated the professor. This research may allow two women to have their own biological daughter.