I had severe morning (all day!) sickness with my oldest and lost 16 pounds the first trimester and gained weight pretty slowly after. I lost some weight with the other two as well (about 10 pounds) and as with the first, did not gain a whole lot, so never delivered at any more than about 12-15 pounds over my pre-pregnancy weight. Despite that all my kids were healthy weight- coming in at 7.5, 8 & 8.5lbs. I had friends that were so envious of my not gaining a lot of weight during pregnancy but I would have taken the weight gain over that awful morning sickness!!