It always surprises me how people against CC because it is bad for the baby tend to recommend co-sleeping, which is really not recommended and any health professional will advise against it. I don't think it's coherent, it puzzles me
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I think nobody likes to leave their baby crying and there is something unnatural about it, but I also think people who decide to do CC are desperate, sleep deprivation is serious and I don't blame anyone for doing it if they are not getting proper sleep. I belive the baby's needs are important and so are the parent's. I really don't believe in being a martyr. Nowadays it seems like the more you are willing to suffer the better mother you are.
But I also think there are other things you could try before CC that are gentler and may work. We bought the book "The baby sleep guide : Practical advice to establish good sleeps habits" by Stephanie Modell (she is a sleep consultant) and I cannot recommend it enough. In the book there is a section about CC but we were lucky enough not to have to go down that route. Simply by reading the book and learning some really interesting things about sleep and applying that, our problem was sorted. You need to identify what is making your baby sleep and if it is something dependant on you, break that habit, also it is really important that the baby falls asleep in the same place he/she is going to wake up. For example, if the baby falls asleep in your arms, then wakes up in the cot, he is going to feel startled as he doesn't understand why he is not in the same place if he rouses during the night. If you want the baby to sleep in the cot then you need to put him in the cot awake.
For us that worked wonders. We were feeding her to sleep before and she will go from my arms straight to the cot. From day one we change this following the advice from the book, she slep through. We didn't leave her to cry though, she likes to pinch our hand's skin for comfort, so the bedtime routine was (and still is) putting her down in her cot awake and one of us lays on the floor and hold her hand, she pinches our hand's skin until she falls asleep and sleeps through.
Maybe we were lucky, I hope you are lucky too and you find an alternative that is not CC, however if you need to do CC, that books tells you how to do it and there are different ways, some gentle than others.
Getting good sleep is very important for babies (and adults), white blood cells, restoration of muscle, realease of growth hormone and many more important things happen during deep sleep, it is good for their health. My DD wakes up sooo much happier since she sleeps well!!!