Saw this on the news this morning: www.itv.com/news/story/2014-07-02/weigh-children-school-year-health-committee-wollaston/
It really struck a chord, as I have had three babies who have bumped along the bottom of the centile chart for weight (and have been pressured into topping up with formula to help them gain). Meanwhile, friends whose kids are at the top end of the chart feel reassured that they are strong and healthy.
Fast-forward a year and the obsession switches to solids and how well your child eats. The measure of "success" here is whether a child will polish off their meals without any fussiness.
I'm not sure exactly when this success turns to failure and your satisfyingly chunky baby becomes a worryingly overweight child but I can't help but think there's a cruel irony here.