When do toddlers develop sphincter control?

Toddlers typically develop sphincter control between the ages of 18 months and 3 years. Most children achieve daytime bladder control by age 3, while nighttime control may take longer, often not fully established until age 4 or 5. The timeline can vary significantly among individual children, influenced by factors such as readiness and developmental milestones. Encouraging a positive toilet training experience can help facilitate this process.