Chorevia

Day 66 of 120 · Week 9

Duets

Last reviewed · 3 min read · 12 sources · Plain-text version

A coo is a turn. When adults take turns instead of talking over a baby, the baby's sounds get more speechlike. The parentese voice you already use, and a script.

A white mother lies on her side on a bed in afternoon light, nose to nose with her nine-week-old, both mouths open mid-sound, a Black father watching from the doorway.

Your baby says "ahh." What you do next matters more than what you say. Today is about turns.

Heart

A coo is a turn, and your baby is waiting for yours. In a 1987 experiment with two groups of 20 three-month-olds, babies whose adult partner took conversational turns, rather than responding at random, made a higher share of syllable-like sounds (Bloom et al., 1987). This month's lesson is "my voice gets answers," and everyday back-and-forth helps build connections in the brain (Harvard Center on the Developing Child).

Head

The voice to use is the one you already use. Parentese is the higher-pitched, slower, more melodic way adults talk to babies (Ferjan Ramírez et al., 2020). Testing in 67 labs confirmed that babies prefer it, though the effect was about half the size earlier studies suggested (ManyBabies Consortium, 2020). In a randomized trial of 71 families, coaching parents at 6, 10, and 14 months increased their parentese and back-and-forth turns, and those increases went along with faster language growth through 18 months (Ferjan Ramírez et al., 2020). That trial started at 6 months, so it doesn't test babies this young directly. Don't count words. Talk with your baby, not just near them.

Body

Sounds are a body skill: making sounds other than crying is on the 2-month list (CDC), and by 4 months most babies coo ("oooo," "aahh"), make sounds back when you talk, and turn toward your voice (CDC). The gap you leave is the practice room.

Try today

  1. The father holds the baby upright on his lap at the kitchen table, leaning in with raised eyebrows and waiting, the baby's mouth rounding into an O.

    Talk-and-pause duets

    Time: 2 to 5 minutes, several times a day · Talk-and-pause duets in the guide

    1. Wait for your baby to coo or gurgle.

    2. Answer in your parentese voice, with a smile.

    3. Pause and wait for the next coo, and keep the volley going.

    Make it work:

    A script, if you need one: "Ooh, you said 'ahh'!" (Pause.) "Ahh! Are you telling me about the window?" (Pause.) "Yes, the light is so bright." Act excited when your baby makes sounds (CDC).

Watch for

  • Normal

    chatty one day and quiet the next.

    Bring it up with your pediatrician

    if your baby doesn't make sounds other than crying, or doesn't react to loud sounds (CDC).

  • Normal

    a new squeal or a grunt in play.

    Call 911

    for new grunting, wheezing, or whistling sounds with breathing, or if your baby is struggling for each breath (Nationwide Children's; AAP).

  • Normal

    a mouthful of spit-up mid-coo.

    Call your pediatrician right away

    if your baby vomits 2 or more times, not just spit-up (AAP).

For you

The mother sits alone on the back step with the phone to her ear, head down, listening, the kitchen window lit behind her.

Say a hard sentence to someone, again. Most perinatal depression begins within 4 to 8 weeks after birth, and low mood, anxiety, or emptiness that is severe or lasts more than 2 weeks may be postpartum depression, which usually doesn't improve without treatment but does respond to therapy, medication, or both (NIMH). Your pediatrician should ask how you're doing at the 2-, 4-, and 6-month visits (Earls et al., 2019), but don't wait to be asked. A sentence will do: "I'm not okay and I can't tell why."

Call or text the National Maternal Mental Health Hotline at 1-833-TLC-MAMA (1-833-852-6262), or call or text 988 (CDC).

If you're the partner: your sentence counts too. And take a duet today, so the baby hears a second voice learning the pause.

Sources

This guide is general education that summarizes published research and guidance from groups like the American Academy of Pediatrics, the CDC, and the WHO. It isn’t medical advice, and every child develops on their own timeline. Your pediatrician knows your child; if something feels wrong, call them. In an emergency, call 911.

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