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Many parents know that babies love to be sung to, but there’s been limited research into the longer-term effects of mothers and fathers singing to infants.

The new research shows that parents should sing to their babies more often because it really does have a positive impact on a child’s mood—and it also can benefit the health and well-being of moms and dads too.

Published in the journal Child Development, the study from an international team of scientists from New Zealand, Canada, the US and Netherlands, looked at the results of using a music enrichment intervention program that encouraged caregivers to sing more frequently to their babies.

The study was conducted with 110 parents and their babies, who averaged around four months old—with most of the caregivers participating from the US and New Zealand being white, educated, and above the poverty line. Study participants were randomly assigned to the intervention or a control group for the main portion of the study which lasted six weeks.

Parents in the intervention group completed a brief, smartphone-based music enrichment program designed to help them sing more often to their babies. They were given access to six instructional videos of simple songs presented in karaoke style, with lyrics synchronized to a bouncing ball and sourced from vintage songbooks, specially made for caregivers with limited music training.

Additionally, participants received a child-friendly songbook that featured infant-pressable buttons which activated song playback, accompanied by illustrations and lyrics for parents to sing along.

Weekly email newsletters also introduced ideas of how to incorporate singing into daily caregiving routines and presented research findings relevant to the benefits of musical parenting.

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Throughout the study, the participants completed smartphone surveys up to three times daily, reporting on both baby and parent mood, stress, sleep quality, and music use.

The findings reveal positive causal effects from simple, low-cost interventions—such as increasing baby-directed singing. The interventions improved health outcomes for both babies and their parents during the four-week intervention.

“Our main finding was that the intervention successfully increased the frequency of infant-directed singing, especially in soothing contexts, and led to measurable improvements in infants’ general mood as reported by caregivers,” said Dr. Samuel Mehr, of Auckland University, New Zealand.

“One interesting finding was how intuitively caregivers incorporated singing into soothing routines for their infants, even though the intervention did not explicitly instruct them to use singing for this purpose.”

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“Encouraging parents and caregivers to sing more frequently to their infants can have a positive, causal impact on infant mood. Because infant mood is closely linked to parenting stress, caregiver-infant bonding, and later social-emotional development, such a simple intervention could have meaningful downstream benefits.”

“For pediatricians and professionals working with families, recommending increased infant-directed singing is a practical, accessible strategy to support infant well-being. It’s easy to do, requires no special equipment or training, and is accessible to everyone.”

“Singing is a universal practice—parents from almost every culture and throughout history have intuitively used singing to soothe and connect with their infants.

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Dr. Mehr says that, despite the intervention lasting only four weeks, the team observed “clear benefits” for infant mood.

“Such positive effects may be even more pronounced with longer-term, higher-intensity interventions—and may also extend to additional aspects of infant health beyond mood.”

The research team is now working on longer follow-up studies comparing the effects of singing, listening to music, and reading on the mood of babies.

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