Study reveals morning sickness risks

Mothers-to-be who suffer from the same severe morning sickness that Kate Middleton was treated for, have an increased risk of a number of complications if they have the condition in the second trimester of pregnancy, research suggests.

There is a higher risk of pre-term pre-eclampsia, premature separation of the placenta or having a small baby if hyperemesis gravidarum is onset during the second trimester.

The Duchess of Cambridge was admitted to the King Edward VII Hospital in London in December, suffering from the rare illness which causes severe vomiting during pregnancy.