Cornthwaite K, Prajapati C, Lenguerrand E, et al. - Researchers sought to determine how the type of bariatric surgery affects pregnancy outcomes. In this national prospective observational study conducted using the UK Obstetric Surveillance System (UKOSS), data were collected from 200 consultant-led NHS maternity units between November 2011 and October 2012 (gastric banding), and April 2014 and March 2016 (gastric bypass and sleeve gastrectomy). Findings revealed differences in maternal and perinatal outcomes according to type of bariatric surgery. A lower risk of anaemia was recorded for women pregnant after gastric banding and sleeve gastrectomy vs gastric bypass. They observed lower risk of gestational diabetes after gastric banding vs gastric bypass despite that women with banding were having significantly greater weight at booking as well as gestational weight gain. Women with gastric bypass more frequently experienced serious surgical complications than those with gastric banding. Researchers recorded a higher birth weight for infants born to mothers after gastric banding vs those born to mothers after gastric bypass. Mothers with gastric banding more frequently had LGA infants vs mothers with gastric bypass or sleeve gastrectomy. Higher risk of preterm birth was recorded in women with gastric banding compared with gastric bypass. Based on these findings, they emphasize considering the impact of surgery on future pregnancy while making choice of bariatric surgery.