Purpose of the study: To compare the occurrence of Unexplained IUFD among different gestational age groups and to find if any possible association with seasonal variation in the occurrence of IUFD. Methodology: A retrospective multicentric study was performed. Secondary data regarding unexplained or uncomplicated IUFD that occurred between January 2008 and December 2019 was collected from hospital records. Gestational age, Date of occurrence and fetal birth weight were obtained and subjected to statistical analysis using SPSS (version.22) software. Results: During the study period a total of 318 IUFD occurred due to unexplained or uncomplicated reasons. The highest occurrence of IUFD (40.9%) was observed in 201 to 250 days gestational age group. The peak occurrence of IUFD was observed in the monsoon particularly in July. Conclusion: Most of the IUFDs were noted during 28 weeks to 35 weeks gestation. We also found an increased incidence of IUFD during monsoon season and in the third trimester of pregnancy.