That’s not the only reason. Overweight women have a harder time conceiving. More alarmingly, men’s sperm counts have been dropping for decades, and not by small amounts. I think it’s a greater threat to humanity than global warming, yet most people aren’t even aware of it.
For every one couple who wants to get pregnant but can’t due to weight or sperm count, I would wager there are dozens and dozens who cannot afford to take on a baby.
