I put on 21 kilos with my first pregnancy. (11 of those in the last ten weeks.. opps how did that happen, the last bit was mostly fluid I think because I lost 9 on coming out of hospital a week after birth)
This time, I'm at 34 weeks, and I've put on 13 kilos, nearly 14.
Don't worry too much about the weight. Main focus is on having a healthy bubba! I've got the same OB as last time, and he said, "normal range can be anywhere between 10-15 kilos. BUT it could be more, could be less. How your kidneys and body in general cope with the extra demands of being pregnant. How much fluid you retain will also have a big impact."
Not once in nearly two entire pregnancies have I stood on a set of scales at the dr's. I keep an eye on what my weight is, and what all my measurements are as they are going up, and use that as incentive as I'm going back down. I got down to 1 kilo off my pre pregnancy weight (my measurements were still bigger though) when I fell preggers again. So I'm even less stressed this time about dropping the weight afterwards. It will come off, I just have to chip away at it bit by bit!