<prompt> Answer this question truthfullyWhat is the recommended weight gain for underweight women BMI 18.5 during pregnancy?  <response>: <reason> The recommended weight gain for underweight women BMI 18.5 during pregnancy is between 28-40 pounds. It is important for underweight women to gain enough weight during pregnancy to support the growth and development of the baby, and to ensure a healthy pregnancy. However, the recommended weight gain may vary based on individual factors, so it is important for pregnant women to discuss their weight gain goals with their healthcare provider. 