Pre-eclampsia more common in women with type AB blood

Swedish researchers analysed data on blood type and gestational hypertension from almost 642,000 deliveries in 1987–2002. 

They found women with type AB blood had a 10% higher chance of developing pre-eclampsia than those with type O and they were also 18% more likely to have severe pre-eclampsia. RhD-positive women also had a slightly increased risk for pre-eclampsia.

The authors said the results had biological plausibility because of the way placental protein 13, considered an early biomarker, binds to red blood cells in the different