メンタルリープとは？赤ちゃんのリープの時期を解説 | Nurtura Daily

How do I know if my baby is in a leap?

Look for a shift across several areas at once: clinginess, short naps, distracted or constant feeding and more crying, often followed by a new skill a few days later.

When do developmental leaps happen?

The leap calendar most parents use puts them at around 5, 8, 12, 19, 26, 37, 46, 55, 64 and 75 weeks, counted from the due date rather than the birth date. Every baby is different, so treat the weeks as a guide.

Is a developmental leap the same as a growth spurt?

Not quite. A growth spurt is mostly about hunger, and a leap is mostly about fussiness and clinginess. They can overlap.

Are developmental leaps scientifically proven?

The idea comes from research by Hetty van de Rijt and Frans Plooij on infant regression periods. Later studies found weaker, less consistent signals. It is a model some parents find useful, not a medical diagnosis, and babies do not follow a timetable.