Obesity in pregnancy is defined as a BMI≥30 and is related to complications and even cases of maternal and infant mortality. The objective was to assess the impact of obesity in pregnant women on the mothers’ health and newborns at Regional Hospital Dr. H. Abdul Moeloek of Lampung in Indonesia. Retrospective data (2017-2023), Cross-Sectional design. The population is pregnant women with 3 categories of obesity: class I-III, with a total sampling method. Statistical analysis uses Chi-Square. A total of 61 obese pregnant women: class I (8.2%), class II (60.7%), and class III (31.1%). The health impacts observed included gestational hypertension (37.7%), preeclampsia (44.3%), CKD (16.4%), HELLP syndrome (6.6%), GDM (42.6%), C-Section (65.6%), PROM (8.2%), postpartum hemorrhage (6.6%), maternal mortality (1.6%), fetal distress (21.3%), asphyxia (3.3%), IUGR (8.2%), IUFD (4.9%), macrosomia (13.1%), LBW (3.3%), prematurity (29.5%), abortion (4.9%), congenital abnormalities (8.2%), neonatal mortality (13.1%). There was a significant correlation between the obesity class and newborn weight (p= 0.038) and there was no significant correlation between the obesity class and gestational hypertension, GDM, or delivery type. High maternal BMI increases the risk of pregnancy and newborn complications. Pregnant women are recommended to achieve a normal BMI before conception and regular pregnancy check-ups.