[Maternal weight gain during pregnancy. Relation to prepregnancy weight]

Area of Science:

• Obstetrics and Gynecology
• Maternal Health
• Human Physiology

Context:

• Understanding gestational weight gain is crucial for maternal and infant health outcomes.
• Previous research indicates variations in weight gain patterns based on pre-pregnancy body mass index (BMI).
• This study examines weight gain trends in a large cohort of healthy pregnant women.

Purpose:

• To characterize typical weight gain patterns during normal pregnancy.
• To investigate the association between maternal pre-pregnancy weight status (categorized by BMI) and the amount of weight gained during gestation.

Summary:

• A study of 1443 healthy women delivering singleton infants analyzed weight gain based on pre-pregnancy BMI.
• Weight gain followed a linear trend, with mean total gains of 0.9 kg at 12 weeks, 7.5 kg at 28 weeks, and 12.9 kg at 40 weeks.
• Overweight and obese women exhibited a tendency for lower rates of weight gain, resulting in less overall gestational weight gain compared to normal-weight women.

Impact:

• Provides normative data on gestational weight gain for a healthy population.
• Highlights potential differences in weight gain trajectories for women with varying pre-pregnancy BMI.
• Informs clinical guidance and patient counseling regarding appropriate weight gain during pregnancy.