It depends what your pre-pregnancy BMI was.
normal body mass index (BMI, the ratio of height to weight) of 18.5 to 24.9 should gain between 25 and 35 pounds (11.5-16 kg)
underweight women (BMI less than 18.5) gain 28 to 40 pounds (12.5-18 kg), and overweight women (BMI of 25 to 29.9) put on 15-25 pounds (7-11.5 kg).
For obese women (BMI greater than 30), the new guidelines specify a "relatively narrow range" of recommended pregnancy weight gain between 11 and 20 pounds (5-9 kg).
thats the official pregnancy guidelines :)
For me you are doing just great - the majority of weight gain happens in the 3rd trimester and towards the end of the pregnancy you may gain pound weekly. Your current number gives you plenty of room then :)
at 10:09 AM on Jun. 6, 2009