In addition, preeclampsia is also clinically divided into early onset and late onset preeclampsia according to the gestational age at presentation of preeclampsia or at delivery. Although the diagnos- tic criteria are the same for early and late onset preeclampsia and the maternal syndrome can be equally severe in early onset and late onset, it has been suggested that the maternal and perinatal morbidities and the mortalities of the two subgroups are different