I never understood this trend. When I was teaching in CO, the community I was in was very conservative. It was full of Mormons, Evangelicals, and Baptists. They all wanted to brag about the number of babies they had produced.
The thing I couldn't understand, was, we lived just 25 miles from a Supermax prison where the worlds worst criminals are being incarcerated. There is a private prison system of everything from miminum security to maximum security facilities a couple of miles from the SuperMax. Pedophile Alert identified multiple persons living in a 25 mile radius of us. Why would anyone want to advertise how many children and their approximarmte ages given these circumstance. Befuddles the mind.