The fuller story
The 2012 study, published in Advances in Neonatal Care, followed the mothers of 162 premature and critically ill babies. They were split into four groups. One got standard care; the other three listened to different music-based recordings while they pumped. The music groups made significantly more milk, and for the first six days their milk carried significantly more fat.
One study is one study, so it helps that others followed. A 2020 meta-analysis pooled five randomized trials, 554 participants in all, and reached a gentler verdict: music has a small, positive effect on milk production. Small, but real, and it costs nothing.
The cows came first. In 2001, psychologist Adrian North and his colleague Liam MacKenzie at the University of Leicester played fast music, slow music and no music to a herd of a thousand Friesians, from five in the morning to five at night, for nine weeks. The slow songs came out ahead: R.E.M.’s “Everybody Hurts,” Lou Reed’s “Perfect Day,” Simon & Garfunkel’s “Bridge Over Troubled Water.” Yields were reported up by as much as three percent. North’s best guess was stress: calmer cows, freer milk. The result made headlines, and as far as anyone has found, it has never been repeated. File it under charming, not proven.
Why it matters
The letdown answers to the nervous system, not to willpower. Anything that tells a body it’s safe (a warm room, a familiar hold, a song you love) makes room for milk to move. That’s why the Rituals Room keeps four playlists on hand. Press play, dim the lights, let the room agree with you.
It’s also why The Memory of Milk spends so long on ritual: the rituals and relationships that can call a nervous system home. And if a slow song can work on a thousand Friesians, it’s worth a try on the two of you.
