My DD is 5 and a half months old. When someone is holding her, she will quote easily fall asleep against their chest. So she's laying on her belly. As soon as you put her in her bed on her back she wakes up. Can you put them to sleep in their beds when they aren't even 6 months old yet. I never know what the right thing to do is. You hear things like SIDS and it just makes me panic.