Most sleep advice starts after delivery. But nervous system development didn’t. Your baby’s wiring began in utero.
Inside the womb, your baby was adapting:
To rhythm.
To hormone shifts.
To stress and calm cycles.
To your breathing patterns.
To your heart rate variability.
This is divine developmental biology.
As Ivana Lombardo writes in “Your Baby Is Learning About You Before Birth,” babies are building foundational regulatory patterns long before they enter the outside world.
They are forming full body expectations and those expectations shape nervous system sensitivity.
Why This Matters for Bedtime
Not all babies enter the world equally regulated. The common labels are chill, velcro, high needs, colicky.
Every human has differences in calmness, alertness, reactivity, and or sensitivity.
That difference is not personality failure. It’s nervous system organization.
And sleep is a nervous system event.
If your baby struggles with transitions, wakes fully between cycles, or seems to stay “on” longer than expected, it may not be about routine length or rocking technique.
It may be about regulation depth.
Highly sensitive systems require stronger bridges into calm.
You Cannot Command a Nervous System Into Sleep
You create conditions for it. The earlier you start... the easier life becomes not from perfection but from empathy.
Warm water.
Predictable sequence.
Low sensory input.
Repetition.
That’s why we start sleep in the bath.
Because water is one of the fastest ways to signal safety to the body.
You are not undoing prenatal development.
You are working with the nervous system your baby has.
If You Want the Deeper Developmental Layer
Ivana explains the prenatal foundation beautifully in her piece:
“Your Baby Is Learning About You Before Birth.”
She walks through how regulation, rhythm, and safety patterns begin long before delivery.
My work focuses on what that means once your baby is in your arms because once you understand that wiring begins early, you stop fighting sensitivity.
You support it.
Sleep doesn’t begin at the crib.
It begins when the nervous system feels safe.
And for many babies, that safety begins in the bath.
