Aim: To compare serum calcium status in pregnant women with and without PIH. Material and method:It was a hospital based prospective observational study conducted in the department of Obstetric and Gynecology, National Capital Region Institute of Medical Sciences, Meerut for a period of 12 months. 200 antenatal cases after 20 weeks pregnancy having age between 18-40 years were divided into 2 types based on BP i.e. Cases-100 patients of PIH (Pregnancy induced hypertension) and Control- 100 normotensive patients. A detailed family and medical history of all the childbearing women with gestational age 20 weeks or more admitted with the features of HDP (hypertension disorder of pregnancy) was recorded followed by a thorough clinical examination. Systolic and diastolic blood pressure of all the participants was carefully recorded every four hourly. Serum calcium levels were measured by the O- Cresol PhthaleinComplexone (OCPC) method.