In short: For newborns and children up to 2-3 months of age, feeding on demand (not by the clock) is the physiological norm and the basis of lactation. As they grow up, most children form a predictable rhythm themselves. A rigid schedule in the first months can harm lactation.
Practical tip: Instead of a "feed every 3 hours" schedule, use the principle of "feed when the baby asks and watch for signs of fullness and hunger." This is one of the easiest ways to support both lactation and a healthy attitude to food.
This material is for informational purposes only and does not constitute medical advice and is not a substitute for medical advice. If a child has alarming symptoms, a pronounced deterioration in health, problems with breathing, feeding or weight gain, it is necessary to contact a qualified medical specialist as soon as possible, and not rely only on information from the Internet.