I'm currently 21 weeks. I started my pregnancy at 60kg. Here's my weight loss and gain so far:

Week 10: 61kg
Week 16: 60kg
Week 21: 64kg

I should point out that I'm only 163cm tall and I had morning sickness from week 6 to week 15 (no vomitting but severe nausea 24/7). Since feeling well again, I've been eating like a horse and the weight gain shows that!