Maintaining a healthy weight can help women become pregnant, achieve a healthy pregnancy and improve chances of having a healthy baby. Being a healthy weight before pregnancy can decrease a women's risk of complications, such as high blood pressure and gestational diabetes, increase the risk of having an infant born preterm and increase a baby's risk of birth or heart defects. Talking to a healthcare provider, staying active and eating healthy foods are activities that can help a person maintain or get to a healthy weight before pregnancy.
Last updated:
February 2024
Data for
Notes: Obese before pregnancy: mother's pre-pregnancy body mass index categories are as follows: underweight (less than 18.5); recommended (18.5-24.9); overweight (25.0-29.9); obese (greater than 30.0). For more information about the availability of PRAMS data by state and year, refer to the Calculations page.
Sources: Centers for Disease Control and Prevention, Pregnancy Risk Assessment Monitoring System. Retrieved October 8, 2024, from www.marchofdimes.org/peristats.
In Oregon in 2021, 29.0% of mothers had a pre-pregnancy body mass index (BMI) classified as obese.
Obese is defined as a body mass index (BMI) of greater than 30.0.