Just read this and thought I would put in my 2 cents. I had also heard this, but in relation to babies. In my family there are 7 children (iam 6th). Mom pretty much followed course with each baby a few ounces bigger than the next. I was the only baby that didn't follow suit, but I was almost a month early (and still over 8 lbs).
My kiddies <all girls>
1st 42 weeks 8 lbs 12 oz 2nd 40 weeks 8 lbs 12 oz
3rd 37 weeks 8 lbs 9 oz. And No 4 39 weeks 7 lbs 5 oz. The older ones are right in the 50-75th percentile in height and weight. Caroline (no 4) is 10 months and barely 16 lbs. She is in the 10-20th percentile in height and weight
