At what age do babies’ arm movements become less jerky?

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DS has just turned three months… he will clasp his hands on his chest, and reach out for things. However:

• his arm movements in the main seem to be quite jerky and random
• for example, sometimes he’ll hit himself in the face
• He still has the Moro reflex and will lift his arms when startled or when being put down.

When should the arm movements begin to get less jerky and random?

About six months.
All sounds normal, so much learning and development going on when they are new.
Learning to drive your body
Learning you are a separate being to your mum
Learning a language
And that's just for starters

So so much. What a huge journey we go on.

Thank you.

It's been a while since mine were babies but 6 months sounds about right. I love this stage, when they sneeze and their whole body moves, and when they hold one arm out when you cuddle them while they are sleeping, like they are trying to flag down a bus! It can be worrying when they are this age and they have got so much bigger than when they were newborn but they are still doing newborn things. They change a lot between aged 3 and 4 months though and they start wanting to play with you a lot more.

Yes 5/6 months things become a bit more fluid. There's a whole bell curve of normal so try not to worry, it will all happen

They can start clapping and learning to sign around 6 months so just before then.