Sleep · 0–12 months · 3 min read · Published 2026-07-05 · Reviewed 2026-07-24

Safe Sleep: The ABCs

Alone, on the Back, in a Crib — the evidence-based rules that dramatically reduce sleep-related risks.

Safe Sleep: The ABCs — illustration

Safe sleep guidance can be summed up in three letters: babies should sleep **A**lone, on their **B**ack, in a **C**rib. These AAP-backed rules dramatically reduce the risk of SIDS and sleep-related accidents, and they apply to every sleep — naps included.

A — Alone

Baby sleeps in their own space: a crib, bassinet, or portable crib that meets current safety standards.

B — On the Back

Place baby on their back for every sleep, from day one until their first birthday. Side and tummy positions raise risk. Once your baby can roll both ways on their own, you don't need to reposition them — but keep starting sleep on the back.

C — In a Crib

Use a firm, flat mattress with a fitted sheet — nothing soft, inclined, or padded. Swings, car seats, loungers, and inclined sleepers are not safe places for routine sleep; if baby dozes off in one, move them to a flat surface when you can.

Extra protection

*Always consult your pediatrician for advice specific to your baby.*

Stop calculating every sleep window

Bloomie Rhythm uses recent sleep logs and age-appropriate ranges to estimate when winding down may help.

Get Bloomie Rhythm
Get Bloomie RhythmApp Store