Society Has Evolved Biology Hasn’t
Across the Western world, the age at which women become mothers has steadily increased over the past several decades, reflecting profound social, economic, and cultural shifts. In the mid-20th century, first births commonly occurred in a woman’s early to mid-20s, closely tied to earlier marriage and more traditional life trajectories. Today, however, the average age at first birth in most Western countries has moved into the late 20s or early 30s, with a growing proportion of women having their first child at 35 years or older.
