What is the expected normal weight gain during pregnancy?

The expected normal weight gain during pregnancy for a woman with a typical pre-pregnancy body mass index is around 28 pounds, plus or minus 3 pounds. This range reflects the average healthy weight gain guideline recommended by health authorities for a woman starting at a normal weight, as it supports both fetal growth and maternal health.

Weight gain during pregnancy varies by individual factors, including pre-pregnancy weight and health conditions. Generally, it is advisable for individuals who begin their pregnancy underweight to gain more, while those who are overweight or obese may be advised to gain less. This variability underscores the need for personalized care, but the 28 ± 3 pounds is considered an optimal target for a healthy pregnancy trajectory, covering the weight of the developing baby, placenta, amniotic fluid, increased blood volume, and maternal tissue.

Thus, recognizing that this guideline is tailored for typical situations helps understand why it is the most accurate choice among the provided options.