For your pre-pregnancy
weight and being pregnant with twins
, you should aim for a weight gain of 20-30 lbs by 20 weeks, 30-46 lbs by 28 weeks, for a total of 40-56 lbs by 38 weeks, which is term for twins. This pattern and amount of weight gain is associated with the best growth for twins and the longest length of gestation. If you do not make the 20-week goal, then try to meet the 28-week goal.