There is usually no single day on which it happens. Then one week you realise she has not been out of that room in a fortnight. The five things that matter, starting with the one that catches every family out.

He caught his foot on the step, grazed his knee and was perfectly fine. That fall did not matter. It is also the best warning anybody is going to give you. What reduces the risk, and what to do in the ten minutes after a fall.