
By Deidre McPhillips
Jun 12, 2026
The smartphone may have become a “substitute” for physical contact and in-person human interaction, the researchers said.
The US fertility rate has been trending down for decades, leaving researchers and policymakers searching for causes that may help pinpoint solutions. There have been all kinds of theories, including soaring costs of childcare, the rise of birth control and even the role of car seat regulations. A new paper offers a provocative culprit in a succinct package: the smartphone. But some other researchers are skeptical that this single factor could play such an outsized role in a much longer-term trend.














