Help draw baby's hand back closer to the body. Or keep your body close to baby when putting her down to sleep. Some say place a pillow on baby's chest but didn't work for mine.
It'll disappear as baby grows. And it's a good sign they are developing well neurologically. I keep rocking her a bit after putting her down, until im sure shes ok
Can’t prevent... it goes away when baby gets older.
Mrs Loh