Woman's stool transplant leads to 'tremendous weight gain'

Dr Colleen Kelly, from the Medical School at Brown University, said the option of a faecal transplant was discussed and the woman wanted to use a relative - her daughter.

The daughter was overweight at the time and was on her way to becoming obese.

Dr Kelly has now changed her practices and "as a result I'm very careful with all our donors don't use obese people".