Bit of background: I am currently teaching our 4 months old to go to sleep in his cot rather than just my arms. After three days of being very consistent he usually settles well for his sleep after he had feed then play (I shush and pat him). However he always wakes up after 40 minutes (on the dot - you can set your clock by it!!). I then try to resettle him to get him into the next sleep cycle but have had no success whatsoever. After trying for 10-15min I give him some quiet time then try again. He takes forever to settle for his next sleep and again it's only 40 minutes. Often I end up having to put him to sleep in my arms, then transfer to cot, just so he'll get any sleep at all.

So my question - what have other people done to get your baby to extend into another sleep cycle?

At night he sleeps 3-5 hrs no problems so I know he can do it then!

Any suggestions appreciated!