Objective : The present study was undertaken to study thyroid hormones in preeclamptic women as compared to normotensive pregnant women and healthy non pregnant controls. Methods : The study was conducted in 250 women who were sub-divided into three groups; 100 preeclamptic women (mild preeclampsia 50 and severe preeclampsia 50) formed the Study group. One hundred age & parity matched normotensive pregnant women and 50 age-matched healthy non-pregnant women were included in the Control group. Results : The TT3 levels were significantly higher in normotensive pregnant women as compared to non pregnant women [pO.OOl].