What is the ideal amount of weight to put on during pregnancy?

It depends on your pre-pregnancy weight. If you are in healthy range as per BMI of your body, then Shrutika is right you need to gain around 25-35 pounds. What are you as per your BMI? Also, there is a right controlled way of gaining the weight with a proper healthy diet.

Underweight women should gain 28-40 pounds while overweight women should gain only 15-25 pounds. :)

10-20 kgs is quite normal. For me, I gained about 10kg for each pregnancy.

25-35 pounds is the ideal amount weight gain during pregnancy.

thanks

Depending on your pre-pregancy BMI.