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OBG · Normal pregnancy: weight gain by BMI
Sample itemA woman with a pre-pregnancy BMI of 22 kg/m2 attends her first antenatal visit. Based on the Institute of Medicine recommendations, what total weight gain is advised for her singleton pregnancy?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. 11.5 to 16 kg
For a normal BMI (18.5 to 24.9) the recommended total gain is 11.5 to 16 kg. Underweight women are advised 12.5 to 18 kg, overweight women 7 to 11.5 kg and obese women 5 to 9 kg. The target depends on pre-pregnancy BMI, not on a single figure for all women.
Option by option
A. 11.5 to 16 kg (correct)
Correct. This is the recommended range for a normal pre-pregnancy BMI.
B. 12.5 to 18 kg
This is the range advised for underweight women.
C. 7 to 11.5 kg
This is the range advised for women who are overweight.
D. 5 to 9 kg
This is the range advised for women who are obese.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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