I wouldn't necessarily be worried. If you havn't put on much weight yet, it's probably fine. All up I put on 9 kg all up with both of my pg's, and you would think it was a kg a month, but it was more like, lost 2kgs, then 4kg's over a few weeks, then nothing for a few weeks, then 4kg's over a few weeks! It should all even out. SOme paople put on more weight than others. It all depends on your own body! Everyone is unique.