This strikes me as absolute horse manure. The study was probably funded by population controllers and run by abortionists.
Sure, having a baby is no picnic. But we have a ton of kids, and my wife is as healthy as they come.
Other studies have shown that people with stable marriages and children generally are healthy and live longer. So, take your pick.
My mother had 4 boys and one girl. She's still doing well at 85. My father died at 72.