Why do more never-married women in their early 40s have kids?

A new demographic of never-married women in their 40s who have children has emerged in recent years, in sharp contrast to traditional family models like the so-called "nuclear family."

In an interview with Lauren Gilger from 91.5 KJZZ, Megan Costa from the T. Denny Sanford School of Social and Family Dynamics addressed this trend. Since teen pregnancies have decreased in recent years, what could be causing this?

Costa is a social demographer who studies household dynamics and maternal and child health in low and middle-income countries. She specializes in longitudinal consequences of fertility and family change.