# Why fathers' first months matter for babies' brains

> Research shows paternity leave builds cognitive and emotional skills that last into adulthood, yet the U.S. lags behind other wealthy nations in guaranteeing it.
- Title: Why fathers' first months matter for babies' brains · TIME
- Summary: Research shows paternity leave builds cognitive and emotional skills that last into adulthood, yet the U.S. lags behind other wealthy nations in guaranteeing…
- Keywords: paternity leave, child development, father engagement, infant brain development, parental leave policy, cognitive development, fathers', first, months, matter, babies', brains
- Source: TIME — https://time.com/article/2026/10/10/paternity-leave-is-more-than-a-perk-it-builds-a-baby-s-brain
- Author: Alvin Thomas
- Published: 2026-10-10T10:00:04.446+00:00
- Read time: 1 min
- Topics: paternity leave, child development, father engagement, infant brain development, parental leave policy, cognitive development
## Paternity leave is medical care, not a perk
The U.S. treats paternity leave like a company benefit, but research shows it should be routine medical care because the return on investment continues years later in a child's brain.
## America lacks federal paid paternity leave
The U.S. is one of the only wealthy nations on Earth with no federal guarantee of paid paternity leave, treating a critical developmental window like a scheduling inconvenience.
## Father involvement builds measurable brain skills
Sarah Schoppe-Sullivan at Ohio State University found children with positive father involvement show better peer relationships, higher intelligence test scores, greater math and language readiness, and more secure attachment.
## Father's play teaches risk-taking and self-control
Canadian researcher Daniel Paquette found fathers' play includes excitement, surprise, awe and temporary shock. This interaction builds crucial developmental skills like risk-taking, personal efficacy and self-advocacy.
## Use-it-or-lose-it policies boost father participation
Other countries increased paternity leave uptake by reserving a portion exclusively for fathers and making it non-transferable. Iceland saw uptake rise from fifteen percent in nineteen ninety-eight to over eighty percent in two thousand two.
## Germany's policy tripled father participation
In two thousand seven, Germany replaced flat-rate leave pay with income-based benefit of sixty-seven percent of net earnings and reserved two use-it-or-lose-it months for fathers.
## Federal legislation could transform child development
Federal paid leave legislation would increase paternity leave uptake and improve access for all fathers, with potential to lead to widespread positive cognitive, academic and emotional development of children.
## Key takeaway

Paternity leave is not a perk but critical medical care; research links father engagement in infancy to better cognitive, social and emotional outcomes measurable into adulthood.