Babies and toddlers go through developmental leaps that disrupt sleep. Parents often call these phases regressions because a child who previously slept well suddenly wakes more frequently. By tracking age, current night wakings, and how consistent the daily routine is, you can gauge the odds of a regression approaching.

The simplified predictor formula is:

where $A$ is age in months, $W$ is nightly wakeups, and $R$ is routine consistency. Higher routine scores reduce the likelihood because predictable bedtimes often stabilize sleep patterns. The result $P$ is a percentage chance, though it is only a rough estimate and not medical advice.

Use this tool to anticipate rough nights and adjust schedules accordingly. Keeping a sleep diary helps identify trends, allowing you to support healthy sleep habits as your child grows.