Very obese women should be denied fertility treatment, experts say. The British Fertility Society is recommending women with a body mass index of 36 and over should not be allowed access to fertility treatment. Underweight women and those classed just as obese (BMI over 29) should be forced to address their weight before starting treatment, the society said. NHS guidelines say overweight women should be warned of the health risks, but do not impose any ban on treatment. Being overweight can put both the health of the mother and child at risk through problems such as gestational diabetes and high...