A growing number of severely overweight women are turning to obesity surgery in the hopes of increasing their chances of becoming pregnant.
Consultant Steve Pollard told BBC News that around 30,000 people die each year as a result of obesity and revealed that some women stop ovulating because they are so overweight.
In some cases, he said, obesity surgery could help women to conceive and have natural births.
"I have done about 1,700 of these gastric bypasses and we have had about 20 resulting births," he told the BBC, adding: "When these women do manage to have babies it gives me such a buzz."
Gastric bypass surgery restricts the amount of food that a patient can eat. Surgeons create a small stomach pouch and then bypass the stomach and a large portion of the intestine, limiting the amount of calories that are absorbed from the food.
Commenting on the number of obese women hoping to become pregnant, British Obesity Surgery Patient Association (Bospa) director Janet Edmond told the BBC: "This is becoming an increasingly common reason for people to have obesity surgery."
Independent advice on private healthcare