hat, similar to his teams work in females, bone marrow cells from adult male mice or from men can be coaxed to make immature sperm cells, both in lab dishes and after transplantation into the testes. Clearly, something is going on here regarding the ability of stem cells in bone marrow to produce immature egg and sperm cells, and we need to figure out what it is, he says. Tilly is an associate professor of Obstetrics, Gynecology and Reproductive Biology at Harvard Medical School.

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Contact: Sue McGreevey
smcgreevey@partners.org
617-724-2764
Massachusetts General Hospital
31-Jul-2007

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