Objectives: The fact that country like India is blessed with four seasons so it is quite reasonable to study the seasonal variations in reference of the most serious and preventable catastrophic condition associated with pregnancy i.e. Eclampsia as it is a major cause of perinatal and maternal mortality and morbidity. Present study was undertaken to assess the seasonal association in occurrence of Eclampsia. Methods: This prospective study was conducted at Ummaid Hospital, Jodhpur over a period of 12 months from Jan 2001 to Dec 2001 on all pregnant women attending the antenatal clinic for consultation and those coming directly to labor room for delivery (Unbooked Cases).