12–24 Months

Unlike daytime learning, nighttime potty training is an involuntary biological process governed by hormonal and neurological development, meaning parents should abandon stressful behavioral tactics and instead use gentle strategies to protect their child's sleep until the body naturally matures.

Potty training readiness is a biological milestone—not an age-based deadline—that requires the alignment of seven specific physiological and cognitive signs before a child can successfully and calmly transition from diapers to the toilet.