By Andrea Holwegner, Health Stand Nutrition Consulting Inc.
To determine healthy weight gain goals for pregnancy you should determine your pre-pregnancy BMI (Body Mass Index).
To calculate your pre-pregnancy BMI:
Print off the attached BMI weight classification chart.
BMI can also be calculated using the formula:
(weight in kilograms) ÷ (height in meters)2
|Pre-pregnancy BMI Category||Recommended Total Pregnancy Weight Gain|
|BMI <20||28-40 lbs|
|BMI 20-27||25-35 lbs|
|BMI >27||15-25 lbs|
Women typically gain between 2-8 lbs (1-3.5 kg) in the first trimester. After the first trimester, weight gain is usually steady through the second and third trimesters.
If you have a pre-pregnancy weight with a BMI <20, weight gain of 1 lb (0.5 kg) per week in the second and third trimesters is encouraged.
If you have a pre-pregnancy weight with a BMI 20-27, you are at the lowest risk for giving birth to a low birth weight or a high birth weight baby.
If you have a pre-pregnancy weight with a BMI of >27, overall approximately 0.5 lbs (0.3 kg) of weight gain per week is recommended.
For women pregnant with twins total weight gain suggested is slightly different.
|Pre-pregnancy BMI Category||Recommended Total Pregnancy Weight Gain for Twins|
|BMI 20-27||35-45 lbs|
If you have a pre-pregnancy weight with a BMI between 20-27 aim for a rate of gain equal to 1.5 lbs (0.7 kg) each week during the second and third trimesters.
For women with a pre-pregnancy BMI <20, weight gain should be emphasized through the entire pregnancy and after 20 weeks of gestation, a weekly rate of gain of at least (1.75 lbs.) 0.8 kg is recommended.
Talk to your doctor about weight gain goals if you have twins and have a BMI >27.