My DD is 10 months and I've noticed that she seems to have lost a couple of skills. For example, she mastered waving a few months ago but doesn't do it anymore, even when I try to encourage it. It's like she's forgotten how. She does point at things, including things she sees and wants. She also recently started babbling. We had a couple of days of very pronounced practice in that, but she seems to have given up on it already!
Is this sort of thing normal at her age? I guess maybe the key is whether she picks it up again soon? Her cousin has autism so I'm definitely watching out for potential signs of that.