Hi Taras Mom,
I don't know if you were serious when you asked if Dr. Brewer recommends anything for women with slower metabolisms. However if you are serious and would like to know what his books says, here are a couple of excerpts.
When to start the Diet:
"A 2,000 calorie per day intake and a well balanced diet when you're not pregnant probably meet the needs of most women of childbearing age. Your calorie needs increase progressively as pregnancy goes on, even if your activity level remains the same. Growing a baby takes a lot of calories. In the first few months of pregnancy, the baby is very tiny and doesn't require large amounts of nutrients, so your appetite may not tell you to eat more. But usually by the fourth or fifth month the 2,500 - 3,000 calorie range becomes more like it, and your appetite increases. If it doesn't you need to find out why."
Calories and Protein:
"The overall aim is for the mother expecting one baby to have 2,600 calories and 100 grams of protein each day, plus salt and other essential minerals and vitamins she needs.... In a normal pregnancy, the mother develops a good appetite, so the single rule governing amounts of food is: eat to appetite. Mothers who are underweight at conception may develop much larger appetites during pregnancy than those of normal weight. Mothers expecting twins or super multiples, need a minimum of 500 more calories and 30 grams more protein daily -for each extra baby."