Maternal obesity poses significant risks for offspring health. This study evaluated the effects of reducing dietary intake of obese overfed ewes from early gestation on fetal growth and development. Sixty days prior to conception ewes were assigned to a control diet [CON: 100% of National Research Council (NRC) recommendations], a diet inducing maternal obesity [MO: 150% NRC] or a maternal obesity intervention diet [MOI: 150% NRC to day 28 of gestation then 100% NRC thereafter] until necropsy at mid (day 75) or late (day 135) gestation. Fetal size and weight, as well as fetal organ weights were greater (P < 0.05) at mid gestation in MO ewes than those of CON and MOI ewes. By late gestation, while fetal size and weight did not differ among dietary groups, cardiac ventricular weights and wall thicknesses, as well perirenal fat weights remained elevated in fetuses from MO ewes compared to those from CON and MOI ewes. At both mid- and late gestation, MO fetuses exhibited elevated (P < 0.05) plasma concentrations of triglycerides, cholesterol, insulin, and cortisol compared to CON and MOI fetuses. While plasma glucose was reduced in CON and MOI versus MO fetuses in mid-gestation, glucose concentrations in MOI fetuses increased to those of MO fetuses by late gestation in association with increased placental GLUT3 expression. These data are consistent with the concept that reducing maternal diet of obese overfed ewes to requirements from early gestation can prevent MO induced alterations in fetal growth and adiposity through late gestation.