Research brief: Sperm developed from bone marrow

Early-stage sperm cells have been created from human bone marrow offering hope for a treatment for infertile men, say German researchers. For the study, mesenchymal stem cells were taken from the bone marrow of male volunteers. The stem cells, which have previously been shown to develop into body tissue such as muscle, were then induced into becoming spermatagonial cells. These cells, normally found in the testis, would then develop into mature sperm cells (Reproduction: Gamete Biology Online 2007).

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