Pregnancy Weight Change Guide
Record your current change and view a total-pregnancy reference range for a singleton pregnancy. This is a guide, not a clinical assessment.
At weeks, your change from your pre-pregnancy weight is shown above.
Your pre-pregnancy BMI is ().
The National Academy of Medicine total-pregnancy reference for this BMI in a singleton pregnancy is .
Current UK guidance
NICE says people are not routinely weighed throughout pregnancy unless there is a clinical reason. If you choose to monitor a singleton pregnancy, BMI-based total reference ranges can be discussed, but they are not a diagnosis or a target for each week.
Read the NICE recommendations (opens in a new window) or NHS pregnancy weight advice (opens in a new window).
Common Questions
When does most weight change happen?
Weight change varies greatly. The NHS says most pregnant women put on most of their pregnancy weight after week 20.
Where does pregnancy weight come from?
It includes your growing baby as well as the placenta, amniotic fluid, increased blood volume, breast changes, body stores and normal fluid changes.