Female only reproduction

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After scientists managed to produce predecessors of sperm cells from male bone marrow tissue, they are seeking for a possibility to produce sperm cells from a woman's bone marrow tissue. The previous research was aimed at restoring fertility to men, enabling them to produce fertile sperm. “But the results also raise the prospect of taking bone-marrow tissue from women and coaxing the stem cells within the female tissue to develop into sperm cells,” said Professor Karim Nayernia of the University of Newcastle upon Tyne. In this case, the lesbian couples would have only daughters as women lack the Y chromosome found in half of the male sperm cells that induce the male sex in embryos. "Theoretically it is possible. The problem is whether the sperm cells are functional or not. I don't think there is an ethical barrier so long as it's safe. We are in the process of applying for ethical approval. We are preparing now to apply to use the existing bone marrow stem cell bank here in Newcastle", Nayernia said. If this proves viable, sperm cells from female bone tissue will be grown in the lab and their ability to penetrate into a hamster's egg (a standard fertility test for sperm) could be easy to check. “But there is no intention at this stage to produce female sperm that would be used to fertilize a human egg, which would require the approval of the Human Fertilization and Embryology Authority,” said Nayernia.

I heard about this a few months ago, probably around the time this article came out, and it blew my mind. I forgot about it though and just remembered again. Figured it would spure alot of conversation and no one has said anything about it here yet.