Opens mouth when seeing bottle
Typical Timing & Development Window
Visual Timeline & Milestone Benchmarks
What these numbers mean
The average age babies first begin showing early signs of this skill. Before this, it's simply too early — there's nothing to worry about.
The midpoint age: half of babies have reached this milestone by here, half a little later. It's a typical target, not a deadline.
How spread out the timing is. About two-thirds of babies achieve it within one standard deviation of the median (the shaded band, wk 9–15). Wide bands mean a normal range of variation.
A gentle check-in point. If your baby hasn't shown this by around here, it can be worth mentioning to your pediatrician — most often it's still perfectly fine, just later.
About this milestone
The infant opens their mouth in anticipation when they see the breast or bottle coming toward them. This indicates early cognitive association, visual recognition, and memory of feeding routines. It shows they can connect what they see with what is about to happen next, a key step in logical thinking.
- 1. Hold the breast or bottle in front of the infant's face for a few seconds before feeding, letting them see it clearly.
- 2. Use consistent, gentle words when preparing to feed them ('Here comes your milk') to help build the connection.
- 3. Establish a calm, predictable routine for feedings, helping them learn what to expect.
- 4. Praise their responsive mouth opening warmly, making feeding a positive, social experience.
- 1. Avoid rushing the bottle or breast into their mouth without giving them a moment to see it and prepare.
- 2. Do not feed the infant in a highly distracted or noisy environment, which can make it hard for them to focus on the routine.
- 3. Avoid using forced feeding techniques; let the infant show you they are ready by opening their mouth.