I wouldn't worry too much about weight gain as long as you have a good diet. I weighed 53kgs pre-pregnancy and lost 9kgs from morning sickness... I really didn't show until 30 weeks and even then everyone commented how small I was and how small my baby was going to be. At my 40week appointment I weighed in just under 57kgs... EVERYONE was shocked with the size of my baby. My weight right now is 48kgs - less than pre-pregnancy. Just goes to show that you can't tell by the size of the bump how big or little a baby is.. or by how much or little weight you put on. Rochelle fit into hardly any of the clothes we had for her because we assumed she would be small.