I measured 2-3 weeks ahead with my DS from 20 weeks on. I had two measurement u/s after that and they were right on. I was induced at 39 weeks for pre-e and he was 8lbs 7oz. Measured dead on with DD, also induced at 39 weeks...she was 8lbs 7oz.
The difference was my DS was 4 full inches longer, so he stretched my uterus out farther.
, wife to Walt
and SAHM to Nick (7/06)
and Olivia (7/09)
and baby Katelyn
(8/11) and currently completing our family through adoption!