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Vaping in pregnancy increases the risk of having a child with behavioural problems, according to new research. Exposure to flavoured e-cig chemicals in the womb leads to hyperactive offspring, while those with nicotine cause even more dramatic changes to a growing foetus' grey matter, warn scientists.

Lead author Professor Mathilakath Vijayan said: "Vape flavourants dull sensory perception and cause hyperactivity in developing zebrafish embryos."