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Postpartum eclampsia of late onset

Pre-eclampsia and eclampsia occur in 6% to 8% of all pregnancies.1 The British eclampsia study confirmed 383 cases of eclampsia during 1992 and warned of the severe consequences of the condition.2 In 1997 Leitch and colleagues showed that over a 60 year period the incidence of eclampsia had fallen from 74/10 000 to 7.4/10 000, although the incidence of postpartum eclampsia had increased.3 
A US study identified 229 cases of postpartum preeclampsia or eclampsia between 1992 and 20024; 151 of these cases were diagnosed after readmission to hospital with new symptoms and signs after delivery, and 16% (24/151) of these had eclampsia. Other work from the United States identified 89 cases of eclampsia during 1996 to 20015; 29 cases (33%) presented in the postpartum period. In both these US studies most cases developed symptoms more than 48 hours post partum.