The newest status symbol for the nation's most affluent families is fast becoming a big brood of kids.
Historically, the country-club set has had the smallest number of kids. But in the past 10 years, the number of high-end earners who are having three or more kids has shot up nearly 30 percent.
Some say the trend is driven by a generation of over-achieving career women who have quit work and transferred all of their competitive energy to baby making.
They call it "competitive birthing."