Women who undergo gastric bypass surgery for weight loss have a higher risk of delivering dangerously underweight babies.
The operation is thought to be one of the only effective ways for people with severe obesity to lose weight and stay trim.
It involves ‘stapling’ together the stomach to divide it in two, re-routing food past most of the stomach so less is digested.
But despite its benefits, the procedure is also associated with vitamin and mineral deficiencies, as it reduces the body’s ability to absorb micronutrients.
And this is likely the reason for new research showing bariatric surgery patients are more likely to deliver babies 1lb lighter than average.