I just got back from a MW appointment. She had some preliminary results from my NT ultrasound, which indicated that the baby was measuring 8 days "larger" than my dates (of which I am 100% sure) indicated. Then she did a poke-n-prod and said I was measuring big, more like 20 weeks than the 15 I actually am.
Both my mom and my MIL had second babies much larger than the first - I was 6 lb 12 and my younger sister was 8 lb something and MILs first kid was about the size of my DD (8 something) while her second (my DH) was nearly 10 lbs. So there's family precedent.
OTOH, I'm only 15 weeks. I pigged out in my first trimester because I could only stomach starchy things, which I have a massive tendency to overeat. I think I put on about 15 lbs, but in the past month I haven't gained any weight at all and I wouldn't be surprised if I put on less than 5 lbs over the rest of my pregnancy. I'm tiny - barely 5' tall - and a bit pudgy but not "plus sized" by any stretch.
So how much credence should I give this "measuring big" bit? Am I likely to have a 10-lb baby? (DD was 8 lb 14 oz, probably a little bloated from the epidural). Or do people frequently "measure big" and then have normal-sized babies?
FWIW now I am over my first-trimester nausea I am eating a mostly paleo diet, plus dairy, but I am not 100% strict about it - if, like yesterday, I'm getting on the ferry and we miss it and the only options are sushi and burritos, I'm having that. But at home, I'm a meat-and-veg kinda girl with very little sugar. So diet from here on out isn't really an issue.