![]() ![]() (And a twin pregnancy might weigh anywhere from 31 to 50 kg. If you were overweight, you should gain 15 to 25 kg (BMI of 25 to 29.9). You should gain 2535 kg (and 3754 kg if you’re having twins) if your BMI is normal (18.524.9). However, using a calculator the weight before pregnancy, current weight, and height are recorded. If you were underweight before getting pregnant, you should gain 30 to 42 kg (BMI less than 20.5). For example, at 20 weeks of pregnancy with a BMI below 25, the weight gain should be about 4.8 kg. newborn growth monitoring - Module 2: Assessing maternal anthropometry and weight gain during pregnancy. If the BMI is up to 18.5, this indicates underweight, up to 25 is within normal parameters, up to 30 is overweight, over 30 is obesity of various degrees.Īfter that, using the table, the indicators are compared. Excel-based Gestational Weight Gain Calculator. It's a measure of the weight compared to the height, which is found using the formula: BMI = weight (kg) / height (m2) Use Health Canadas pregnancy weight gain calculator Opens in new window to calculate your pre-pregnancy body mass index (BMI) and see what a healthy weight. In order to precisely calculate the rate BMI is used. How to calculate the pregnancy weight gain rate? It is worth noting that only up to 30% of the gained weight is the fetus, the rest is amniotic fluid (about 10% or up to 2 kg), breast enlargement up to 1 kg, body fat up to 3 kg and an increase of BV (blood volume) up to 2 kg. The attending physician provides a BMI (body mass index) table to observe the development of the fetus. 3 Our Pregnancy Weight Gain Calculator is based on the Institute of Medicine recommendations. Using this calculator, both the woman and the obstetrician-gynecologist can keep track of the weight that should be at each stage of pregnancy, which means the normal development of the fetus. While the values vary between women, the Institute of Medicine recommends an overall pregnancy weight gain of 25-35 pounds for women who are considered 'normal' weight (BMI 18.5-24.9), 28-40 pounds for those considered underweight (BMI 18.5), 15-25 pounds for those considered overweight (BMI 25-29.9), and 11-20 pounds for those considered obese (BMI > 30). ![]()
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