Final answer:
The recommended weight gain for an overweight woman during pregnancy is 5-10 lbs. This controlled gain supports fetal growth while limiting health risks associated with excessive weight gain.
Step-by-step explanation:
The recommended weight gain for a woman who is overweight during pregnancy is option B, which is 5-10 lbs. It is essential to gain weight in a healthy way to support the growing fetus. As mentioned, during the first trimester, the mother does not need additional calories, but a weight gain of about 0.45 kg (1 lb) per month is common. In the second and third trimesters, the mother should consume an additional 300 calories per day to support the fetus, which equates to an approximate 0.45 kg (1 lb) per week weight gain. It's important to adhere to these guidelines as excessive weight gain can pose health risks to both the mother and the baby, increasing the likelihood of gestational diabetes and obesity later in life for the child.