A woman’s body goes through a long list of changes during pregnancy, and weight gain as the baby grows is one of the most obvious. Neither too much nor too little weight gain is healthy for mother or child. An obstetrician or other childbirth professional monitors an expectant mother’s weight throughout her pregnancy to ensure she is on track for a healthy delivery.


1. Body Mass Index

Assessing body mass index (BMI) is the first step in determining how much weight gain is healthy during pregnancy. BMI is a measure of body fat in adults based on their weight and height. Generally, physicians consider a pre-pregnancy BMI of 18.5 to 24.9 to be a healthy range, with 25 being overweight. As BMI rises beyond this point, so does the risk of pregnancy complications. The lower a woman’s BMI, within the healthy range, the lower the chances of issues during pregnancy, barring other factors.

body mass index pregnancy weight FotoDuets / Getty Images


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