Female Supremacy Articles - Page 24 "Women's town" to put men in their place

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"We want to test the functionality of any male and female sperm that is made by this way," Professor Nayernia said. But he said there was no intention at this stage to produce female sperm that would be used to fertilise a human egg, a move that would require the approval of the Human Fertilisation and Embryology Authority.

The immediate aim is to see if female bone marrow can be lured into developing into the stem cells that can make sperm cells. The ultimate aim is to discover if these secondary stem cells can then be made into other useful tissues of the body, he said.

The latest findings, published in the journal Reproduction: Gamete Biology, show that male bone marrow can be used to make the early "spermatagonial" stem cells that normally mature into fully developed sperm cells.

"Our next goal is to see if we can get the spermatagonial stem cells to progress to mature sperm in the laboratory and this should take around three to five years of experiments," Professor Nayernia said.

Last year, Professor Nayernia led scientists at the University of Gottingen in Germany who became the first to produce viable artificial sperm from mouse embryonic stem cells, which were used to produce seven live offspring.

His latest work on stem cells derived from human bone marrow suggests that it could be possible to develop the techniques to help men who cannot produce their own sperm naturally.