Monetary policy is often portrayed as a technical lever—moving interest rates to manage inflation and aggregate demand. Yet recent evidence suggests its reach may extend far deeper into household life than previously imagined. Beyond spending and borrowing, central bank decisions might be shaping one of society’s most fundamental choices: whether and when to have children.

Across both advanced and emerging economies, fertility rates have fallen to historic lows. This demographic transition is transforming labor markets, altering savings behavior, and affecting long-term growth potential. As governments worry about aging populations and shrinking workforces, an overlooked question emerges: could monetary policy itself be influencing fertility—and, if so, what does that mean for economic development?