Aims and objectives: In the present study, we evaluated the maternal serum concentration of LDH and its utility as severity or diagnosis marker for HDP. Material and methods: This is a prospective study which was conducted in the department of Obstetrics and Gynecology in collaboration with the department of Biochemistry Geetanjali Medical College and Hospital, Udaipur for 12 months. Pregnant women with hypertension >20 weeks of pregnancy admitted and maternity ward and women with PIH (pregnancy induced hypertension) delivering in emergency were enrolled in this study. Results and conclusion: Increased LDH levels is associated with early intervention in preeclampsia and eclampsia patients –lowered gestational age. Increased LDH levels is associated with organ damage in preeclampsia and eclampsia patients – high urine albumin levels. Increased LDH levels is associated with poor maternal outcomes in preeclampsia and eclampsia patients –high incidence of HELLP and abruption. Increased LDH levels is associated with poor perinatal outcomes in preeclampsia and eclampsia patients –high incidence of IUGR and IUD. Increased LDH levels is associated with low baby weight in preeclampsia and eclampsia patients. Increased LDH levels is associated with high emergency LSCS rates in preeclampsia and eclampsia patients. In conclusion, LDH levels reflect the severity of preeclampsia and the occurrence of complications.