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New research provides the first clear evidence that the amount of nutrients transported to the foetus by the placenta adjusts according to both the foetal drive for growth, and the mother’s physical ability to provide.

Cambridge researchers are pioneering a new test for autism in the womb, by measuring the levels of testosterone produced by the foetus, which makes its way into the amniotic fluid. They hope to test if children who later develop autism have unusually high levels of testosterone between 12 and 20 weeks of pregnancy.