At the very very end of pregnancy, I had an awful craving for goat milk. I wanted it so badly, I would almost start shaking if it wasn't in the house. I drank a lot of it, with the record consumption of 3 1/2 liters - almost a gallon - in one day. It was the perfect drink that also was a meal. Didn't take extra space in the stomach. (I also tried to eat lots of protein, etc., with snacks like 1 lbs of frozen shrimp, nuked, with sauce, or a large protein shake, or other healthy stuff; and I also drank lots of water on top of all that.) Our recycling was full of goat milk bottles.
I started out at 5'8", below 110 lbs, and gained 80 lbs - although at the end, a lot of it was water. My hands and feet were swollen (I wore compression hose), knees swollen and kind of disappeared, even the muscles above the collarbones were swollen and watery - that surprised my doctor. I was measuring 53 cm a week before birth.
Here's a link with some nutrition info:
The babies were 6 lbs and 6 lb 3 oz, 18" and 19.5", at precisely 38 weeks. I'd say my diet paid off.