As more men overeat, party hard, and expose themselves to chemicals, sperm counts are plummeting throughout the developed world—and it’s affecting couples now.
Heather Turgeon is a psychotherapist and science writer. She authors the column "The Science of Kids" for Babble.
It's a lot more than you think. Heather Turgeon on new research that says our earliest days stay with us for life—and influence everything from our well-being to our favorite smells.