This chapter summarizes the most commonly performed bariatric operations. It reviews the impact of pre-pregnancy bariatric surgery on the female reproductive functions and the relevant pregnancy outcome parameters. The chapter formulates recommendations for clinical care of these patients for both the postoperative as well as the prenatal period. Mixing the different types of bariatric surgery might lead to unreliable conclusions since a different outcome can be expected after the restrictive type than after the malabsorptive types. Women experiencing pregnancy after bariatric surgery have important reproductive health care needs. The specific needs of these high-risk pregnancies are best addressed by a multidisciplinary team including obstetricians, surgeons, endocrinologists, pediatricians, psychiatrists, and nutritionists. Some aspects of prenatal care in women with a history of bariatric surgery require specific attention. Pregnancy after surgery improves many pregnancy outcomes but adds new risks related to nutritional deficiencies and surgical complications, thus requiring a specialized multidisciplinary approach.