WHY THIS ONE
They pull themselves up before they can catch
themselves.
Protective extension, the reflex that throws a hand out to break a fall, arrives in a fixed order. Forwards at five to six months. Sideways at seven to eight. Backwards last, at nine to ten.
Most babies pull themselves to standing at around eight months. So for a few weeks there is a real gap: they can get upright, and they cannot yet catch themselves going the one direction they are most likely to go.
This is not a reason to panic. Researchers at Purdue's Motor Development Lab recorded 39 thirteen-month-olds across twenty minutes of free play and counted roughly 250 falls, almost none of which produced tears, and none of which stopped the child getting straight back up. Falling is ordinary. It is also, briefly, unpadded.
Claxton, L., Thompson, P., & Shalit, E. Motor Development Lab, Purdue University, 2025. · Adolph, K. E. et al. (2012).