In pregnancy, the total recommended weight gain is primarily determined by which factor?

• A. Age of the mother.
• B. Pre-pregnancy BMI.
• C. Ethnicity.
• D. Parity

Answer: (B)

The main idea is that total weight gain during pregnancy is guided by pre-pregnancy BMI. That starting BMI places the mother into a category that reflects her baseline reserves and risk for complications, so the recommended gain is adjusted to optimize fetal growth while protecting the mother. The chart shows different ranges: those who start underweight should gain about 28–40 pounds; normal weight about 25–35 pounds; overweight about 15–25 pounds; and obese about 11–20 pounds. This tailoring helps ensure enough resources for the fetus without unnecessarily increasing risks like gestational diabetes, hypertension, or delivery complications.

Age, ethnicity, and parity can influence pregnancy risk and monitoring, but they don’t set the standard total weight gain; BMI does, because it best captures the physiological needs related to starting body size.