During pregnancy, protein needs a. increase by an additional 40 grams or so of protein per day. b. increase to 1.1 g/kg of body weight. c. remain 0.8 g/kg of body weight, resulting in a slow increase as the woman gains weight. d. remain 0.8 g/kg of body weight throughout the first and second trimesters, then increase to 1.8 g/kg of body weight in the third trimester.