Pregnancy induced hypertension complicates about 10% of pregnancies, but there is a widespread geographic variation in its incidence.The incidence is higher in developing countries. The highest reported rate of pre-eclampsia is 7.1% (deliveries) from Zimbabwe2, while the incidence is as low as 0.81% (deliveries) in Colombia3. In UK, the incidence of severe pre-eclampsia is 5/1000 maternities4, while the incidence of eclampsia is 4.9/10,000 maternities5. The incidence of severe pre-eclampsia in European countries ranges from 2/1000 (deliveries) in Norway to 6.4/1000 (deliveries) in Belgium and Hungary6.
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