For a 27-year-old pregnant woman with a preconceptual BMI of 19, the total recommended weight gain during pregnancy should be between 11.5 kg (25 lb) and 16 kg (35 lb), with 16 kg being the upper limit of the normal BMI range recommendation.
A 27-year-old pregnant woman with a preconceptual body mass index (BMI) of 19 falls within the normal weight range. Based on general guidelines for weight gain during pregnancy for those with a normal BMI, the recommended weight gain is about 11.5 to 16 kg (25 to 35 lb), depending on the individual's circumstances and health recommendations provided by a healthcare professional.
Considering this information and the typical physiology of pregnancy, which includes no additional calorie needs during the first trimester and about 300 extra calories per day during the second and third trimesters, answer option b.16 kg (35 lb) aligns with the upper limit of the recommended weight gain range for a normal weight individual.
In conclusion, the nurse should know that the total recommended weight gain during pregnancy for a woman with a preconceptual BMI of 19 should be at least 11.5 kg (25 lb) but not more than 16 kg (35 lb), with 16 kg being the maximum recommendation.