The weight gain recommendations for pregnant Canadian women has recently been changed to match the US recommendations.

"Gestational weight gain recommendations are based on a women's body mass index (BMI) prior to pregnancy.

Under the new guidelines, women with a body mass index less than 18.5 prior to pregnancy - considered underweight - have a recommended range of total weight gain between 28 and 40 pounds (12.5 and 18 kilograms).

Women in the normal weight category with a BMI between 18.5 and 24.9 have a recommended range of total weight gain from 25 to 35 pounds (11.5 to 16 kg).

For overweight women with a pre-pregnancy BMI between 25 and 29.9, a total weight gain between 15 and 25 pounds (seven to 11.5 kg) is recommended. Obese women with a pre-pregnancy BMI of greater than 30 are advised to gain no more than 11 to 20 pounds (five to nine kg) during pregnancy."

http://ca.news.yahoo.com/s/capress/091120/health/health_pregnant_women_weight