The Sound That Every Human Recognizes - Even Before Birth

Have you ever noticed how quickly we react to a familiar voice, even in a noisy room?
That sensitivity starts much earlier than we imagine.

By around the 25th week of pregnancy, a baby’s hearing is already developed enough to recognize sounds coming from outside the womb. The most important one? Your voice.
Research from Stanford University shows that even newborns react differently to their mother’s tone – their heart rate slows down, and brain regions linked to emotional regulation become active.

Your voice doesn’t need to be calm or perfect. It just needs to be yours. Talking, humming, reading out loud – all of these small things help your baby’s developing brain build patterns of familiarity and trust.

You’re not “just talking to your belly” – you’re literally shaping your child’s sense of safety.
And later, that same voice will help calm them in ways no white noise machine ever could.

Download the HiMommy app to learn what your baby hears, feels, and responds to each week of pregnancy – explained simply and backed by real science.

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