Preeclampsia, a highly morbid disease, affect about six per cent of pregnant women in UK with tendency toward primigravid women. A lot of theories has been postulated regarding its etiology and pathogenesis including genetic, immunological, vascular and nutritional factors. In the last years, disturbance in homeostasis of trace and ultra trace elements has been implemented in the etiology of preeclampsia. This book discuss the possible mechanisms through which these elements might cause preeclampsia, method of measuring them and difference in their blood level when comparing preeclamptic patients with healthy pregnants.