Somewhere around nine or ten months, a baby knows exactly what they want. They can see it, want it, practically taste it - and they have no way to tell you. So they point, grunt, arch their back, or just cry, and you are left guessing through a growing list of "is it this? is it this?" while everyone gets more frustrated. That gap between a baby's wants and their words is completely normal. It is also exactly what baby sign language is built to bridge.
What It Actually Is
Baby sign language is not the full grammar of American Sign Language. Most families use a small, informal set of gestures - borrowed loosely from ASL - for the handful of words a baby reaches for most: more, milk, all done, eat, help, again. Because babies gain control of their hands months before they gain control of the fine muscles needed for speech, they can often wave, tap, or open and close a fist to mean "more" long before they can say the word.
What the Research Actually Shows
The good news for anyone worried this is just another thing to add to the to-do list: it will not slow down talking. Research published in the Journal of Applied Behavior Analysis has found that signing with hearing babies does not delay speech - and several studies point the other way, suggesting it may support vocabulary growth and even early literacy skills. The American Academy of Pediatrics notes on HealthyChildren.org that babies taught simple signs around 6 to 7 months may start using them as early as 8 or 9 months, closing a communication gap that can otherwise stretch on for months.
It is also worth being honest about the limits. Some researchers point out there is not strong evidence that early signing produces lasting gains in IQ or reading years down the line. That is fine. You are not signing to give your baby an academic edge. You are signing to make one particular, exhausting stretch of the day - the guessing game - a little easier for both of you.
A Few Signs Worth Starting With
You do not need a class or a curriculum. Pick two or three signs that solve your actual daily friction points, and use them consistently while you say the word out loud.
- More - fingertips of both hands tapping together, useful at nearly every meal
- Milk - opening and closing a fist, like squeezing
- All done - hands turned palms-up and out, a lifesaver at the end of meals or baths
- Help - a fist tapped on top of an open palm
- Gentle - one hand stroking the back of the other, handy with a new pet or a new sibling
Keeping It Low-Pressure
Start around 6 to 9 months, and do not expect anything to click right away - it can take weeks of you modeling a sign before a baby produces it themselves, and that is completely typical, not a sign anything is wrong. Sign the word every time you say it, especially in the moment it is most relevant: sign "milk" right as you offer the bottle, not in a flashcard drill later. If your baby never picks it up, or picks up their own version of a sign that looks nothing like yours, that is fine too - the goal was never a perfect performance.
You are not behind if you start at 10 months instead of 6, and you are not doing it wrong if your baby's "more" looks like a tiny fist bump instead of a textbook sign. The whole point is a shortcut through frustration, not one more thing to get right.
If your baby is a few months past a year and speech has not started showing up at all - no words, no clear gestures, no signing - that is worth mentioning to your pediatrician, separate from whether or not you ever tried signing. But for most families, this is simply a small, low-stakes tool: a few gestures that let a baby say "more, please" a little sooner than their mouth could manage on its own.