Hi NC. My first question would be, does it worry you or your baby if your baby has short sleeps, more often? Sometimes it is the result of the busy little life babies have when they are on an older siblings activity schedule, sometimes it just happens. If it bothers you or your baby there a few things you can try, and I am sure you will get LOTS of suggestions, so just take what works best for you and your family :) After the first sleep cycle, babies often will have difficult returning to sleep if they become too awake and alert, so my first idea would be you do what your were doing before, that is, responding sooner rather than later, or even just shh from outside the door when your little boy begins to stir at the end of the sleep cycle. If that is not comforting and helping him return to sleep, go to him and just quietly shh or soothe your baby the same way you do when he first goes off to sleep. That is really basic but often surprising successful. Another thing parents often do, is stay low beside the cot at this time so little tired babies do not see the parent standing over them looking as if they are about about to pick their baby up.. that would be so disappointing and confusing for babies. Seeing your baby has just completed one sleep cycle it means he may be full of energy and not the slightest bit interested in returning to sole, and will have the stamina to tell you that for as long as you are prepared to try. Don't persist with settling long periods, rather set up the idea you will be there (in voice or person) to offer comfort without needing great distress. If he doesn't respond to your comforting efforts, it's not working, and just get him up, AND do the same thing next time and the time after. It is about being predictable at that very first moment of waking where you can create the sense you will be there to soothe him, without distress. Over time babies begin to anticipate your comforting and lie quietly in wait ... and in that time, return to sleep. I hope that helps a bit. Helen (Safe Sleep Space)