I lost 6kg in the first 16wks with DS, and then put back on 14kg, but lost it all after he was born before putting on a whole heap more weight from the stress of TTC... I had bad all day sickness with DS, not enough to put me in hospy other than a few trips to emergency for dehydration, but enough that I could hardly eat anything for the first 16wks.

This pregnancy I've lost 12kg in the past 10 wks, and the MS hasn't been quite as bad as it was with DS, but bad enough to make me choose when I eat a lot better lol
Helps that I crave a lot of healthy stuff (fruit & veg) but I also make sure i get to ease my cravings for sugary things and chocolate once a week or I'd go nuts.

I'm half hoping I'll loose another 10kg before bub is born, as when bub was conceived I weighed 110kg... so not very healthy at all!