The American family is changing in many different ways. But perhaps one of the most significant is that, on average, American women are giving birth later. And birth rates have hit a 30-year low. In the early 1970s, the average age of first-time moms was 21… it’s now 26. The same trend is impacting fathers - their age has gone from 27 to 31 over the same time period. But why did this change happen? And what does it mean for our society, our economy, and our families? To find out, we talked to Caitlin Knowles Myers, an economist at Middlebury College who’s studied female fertility, and Claire Cain Miller, a correspondent for the New York Times who’s written extensively about the topic.