A mother who had the same condition as the Duchess of Cambridge says the illness is debilitating.
Sara Hannak from Belper suffered from hyperemesis gravidarum during her first and second pregnancy.
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Occasional rain interspersed with drier periods. Rather warm.
Some rain tonight but largely dry.
Police are concerned for the welfare of Samantha Baldwin and her children, nine-year-old Louis Madge and six-year-old Dylan Madge