Woman has sex with a pig

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The Australian Outback can be a lonely place, but a male kangaroo and his female pig companion appear to have found a solution.

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Female pigs' reproductive systems recognize whether a sperm will produce a boy or a girl before it reaches and fertilizes the egg, and their oviducts fallopian tubes change in response. Scientists think this may be a way females unconsciously influence the sex of their offspring. The findings, reported in the open access journal BMC Genomicsshow that different genes are active in female pigs' reproductive system cells in experimental conditions when all X female or all Y male sperm are present.

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