My DS had got him self into quite a reasonable pattern of cluster feeding and napping from about 7 - 10pm then sleeping until 5.30am, quick feed and back to sleep until about 8am. At about 4 months he started waking in the night every 3 hours like clock work, on the dot, then it got even shorter intervals and less systematic/predictable. Now we're lucky if we get one 3 hour stretch at some point in the night and he sleeps for anything from 40 minutes to 2 hour stretches before waking. He's 24 weeks now so we'll soon be weaning. Lots of people have said get him on solids, he must be hungry, but he is not going any shorter time between feeds in the day and still seems happy and full after his feeds in the day so I'm keen to hang on a bit (and certainly felt it wasn't that at 4 months). Just wondered how long the 4 month sleep regression lasts adn when I might expect a reasonable amont of sleep again?!