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Mothers-to-be are three times more likely to suffer from severe morning sickness if their mums had the same discomfort.
According to the study of 2.3 million births, mothers who suffer excessive nausea and vomiting in pregnancy - known as hyperemesis gravidarum – are at a threefold higher rate of having the condition if their mums had it too.
To reach the conclusion, birth records from 1967 to 2006 were analysed, which included information on pregnancy complications.
Writing in the British Medical Journal, the researchers said that the study shed a new light on the causes of hyperemesis in pregnancy.
"It might lead to a better appreciation of the underlying biology," they added.