At how many months old is it safe to put your baby in a duyan for a nap?

You also have a human duyan alternative. Learned from a class that the Gym ball is a good investment. As you sit on it with your child in your arms, it will simulate an actual duyan feel. Best part is you wont get tired standing up as you are just bouncing and getting support from the ball and you feel safe with your baby on your arms vs. a duyan that runs the risk of not being tied securely. newborns ok for this process.

I think it's safe even for newborns, but just don't swing the duyan too much especially after feeding as this may cause reflux. I think duyan is a god-sent baby gear in putting your baby to sleep so take advantage of it, with precautions of course.