Eating a healthy diet and being physically active are especially important in pregnancy as your unborn baby has to get everything it needs to grow and develop from its mother. If your weight is higher or lower than the healthy range when you become pregnant, it can affect your pregnancy as well as your general health. Healthy lifestyle and vitamins in pregnancy What is a healthy weight? We use your height and weight to work out your body mass index (BMI). BMI Healthy range 18.5 to 25 Underweight less than 18.5 Overweight 25 to 30 Obese 30 and above During…