I've posted on here before about split nights and got no response, but I am getting a bit desperate for sleep so I am trying again. In a nutshell, my son is 18 months old, never been the best sleeper and we've had split nights off and on since 4 months old. He started sleeping through occasionally around 16 months, and some nights he still does, but I'd say 5 out of 7 nights a week he's up around 2am for about 2 hours. He's not poorly, calpol doesn't make a difference so I don't think it is due to teething. He has 1 nap a day, if he's at nursery this might only be 45mins, but he naps better at home for anything up to 3hrs, but generally averages 1.5hrs - 2hrs nap at 12:30. He goes to bed at 19:30. Wakes up between 6 and 7. He's in a dark room, in his own cot. We have white noise playing. Heating on low so he isn't cold. We're absolutely exhausted and have actually paused TTC baby number 2 because we don't know how we'll cope with getting up so often with a baby and a toddler. Has anyone managed to find the cause of split nights in their toddler?