HI Girls. I was also very slim before falling prg - 56kg and 170cm tall. By the time I was 6 or 7 weeks I could not fit into any of my size 8 bottoms and definitely none of my jeans! I found I lost my waist almost as soon as I conceived and also felt extremely bloated for the first 10 - 12 weeks, which made me feel nothing but fat... I'm now 18 weeks and although I don't have a pregnant 'belly" yet, I certainly feel like I am showing. Only those who know me really well can tell, I guess the others just think I'm a bit over weight (LOL). Can't wait for a nice preggie belly to shut them up! BTW, I bought some fab maternity skirts that I am already wearing. They don't look like mat. wear but they are so much more comfortable than the normal stuff i was sqeezing into for work.