Obesity poses a significant risk to reproductive-aged women. Weight reduction before conception is the best way to increasing fertility and reduces obesity associated morbidity. When medical interventions fail, bariatric surgery is the most successful method of weight loss, effective increasing fertility and reducing obstetrical complications and maternal and neonatal morbidity comparing obese women. Gastric banding and gastric bypass are the most increasingly utilized treatment option in France and should be offered to morbidly obese women of childbearing age. This literature review provides information about different techniques of bariatric surgery and about the multidisciplinary management of these pregnancies (monitoring, micronutrient supplementation) to promote maternal and fetal wellbeing in concert with continuing postoperative weight control.