You are underweight, meaning that your weight is below your healthy weight. The risks to both your health and to the baby’s are higher if this weight has been reached and maintained through weight loss diets than if you’ve always been thin.
If you are naturally thin, being underweight isn’t necessarily synonymous with health risks. But it may cause medical and obstetrical complications, as well as growth delay, premature delivery and an underweight newborn. Don’t worry: if you gain enough weight during pregnancy, these risks will be considerably reduced.
You have a healthy weight (between 20 and 25) or are slightly overweight (between 25 an 27).
A BMI of between 20 and 25 is associated with a lower risk of disease and pregnancy complications. If you are at this level, stay there!
A BMI of between 25 and 27 involves slightly higher health risks.
You are overweight, meaning that your weight is above your healthy weight. Such a BMI is associated with higher risks of health problems during pregnancy, such as diabetes, high blood pressure, preeclampsia and complications at childbirth.