Fewer babies are being born across the United States.

Approximately 3.7 million babies were born last year. That's the lowest number since 1986.

Last year was the fourth straight year the number of births has fallen.

Rates also hit record lows for teens and women in their 20s.

It is not clear if more women are postponing motherhood or forgoing it altogether.

Experts warn that if the trend continues, the United States can expect labor shortages, especially in fields like elder care.