Ds1 didn't sleep through until he was about 3.5-4 he was a terrible sleep from the day I brought him home from hospital. We had a routine, we didn't have a routine, we Co slept we tried it all. We had to cio with him to get him to go to sleep initially which took 3 nights at 18 months I also stopped night feed at this time as well hoping it would stop the wake ups it didn't he would still wake 3-5 times a night wanting varying things drink, toilet once tt, put covers back on, had nightmare the list went on he is now 7 goes to bed between 7-7.30 each night and unless sick doesn't wake until 6-6.30 each morning. Sometimes it doesn't matter what you do/try your child won't sleep more then they want to.
Ds2 18 months slept through pretty much from when he was born, 6.30-5.30, he occasionally wakes once through the night has a little drink then goes back to sleep. My boys couldn't be more different
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