- Obesity is a worldwide growing epidemic. The negative influence of obesity is huge and considered to be one of the major contributors to health problems in the western world. There is a significant association between obesity and diabetes mellitus, ischemic heart disease, some cancers and syndromes of sleep apnea. Furthermore, obesity was described to have a negative influence on fertility, pregnancy, labor and pregnancy outcomes. It was also discovered that obesity was significantly associated with gestational hypertension, preeclampsia, gestational diabetes mellitus and complications in cesarean delivery and anesthesia. This review aims to present updates on the relationship between obesity and pregnancy and labor outcomes, emphasizing the significance of obesity as a risk factor for adverse pregnancy outcome.