I don't believe that any of the formulas or any way of guessing their full grown weight is accurate because I had Max weighing 1.4lbs at 4 months & now he weighs 7.4lbs at 1 year & 4months! Tia was also 1.2lbs at 3months and is now 5.4lbs at 7months. Lexi was 1.4lbs at 3 months and weighs 4lbs at 1 year & 9 months. Even the parents weight doesn't help. They are just like people from the same family who are all different sizes and hair color etc! |