I always been a small girl. When I became pregnant with my now ,17month old daughter, I was recommended to gain 40lbs due to being under weight, well anyways I am now expecting once again , currently 22weeks, yet my belly is so small compared to my previous pregnancy. I was told the 2nd time your bigger. I am the size of a women of 12weeks, yet my lil girl weighs 12 ounces. Healthy! Does this happen to many women?