Hi What is the difference between nap and sleep? My partner tells me that when a baby is napping he keeps waking up and falling asleep. I thought a nap was a good sleep but for a shorter period of time. At the moment , Thomas is not sleeping really, just closing his eyes for a few minutes and then opening them until he cries. Is this a nap then? How long should babies of 4 weeks old sleep during the day? Thomas slept from 9.30 pm till 2.50 am, then from 4 am till 6 am and then from 7.20 till 8.20. Then he slept for 50 minutes during the afternoon but that is it really for the day. Can a baby sleep in your arms ? I read it is a risk of cot death.