I was just reading about "Fuberizing" your baby, which is a CIO method of sorts... but most doctors agree that it isn't until a baby is 4-6 months before you should allow them to CIO. Right now is the time that you need to re-affirm to Niamh that when she cries (calls out to you) that you'll come. It's the beginning stages of her awareness of self-worth. Doing it this early could affect that and make her feel worthless... so to speak.
Of course she wouldn't think that specifically, but I do think it would have a profound effect on a newborn that when they called, nobody answers.
Just my 2.5 cents
I did CIO at 2.5 months , you do answer to them. You dont just leave them there crying and crying.
Once you know when your baby is tierd is when the time to do it , i kept going back every 30 seconds to sooth her , not picking her up , hushing and smiling making sure she knows mummy is not far so she can sleep without me having to hold her pretty much 24/7.
I just wanted to chip in as there are so many people on this forum saying , its not right , you shouldnt do it etc etc.
Whatever you decide to do for you and your baby is 100% up to you , im saying this because later down the line and IF LO isnt sleeping well and you have tried everything apart from CIO because of all the 'horror stories' that its not evil and its not doing baby any harm. Tis all
Im a success story and its nice to see if its worked on others, not exactly helpful with people preaching about it when they havnt even tried it, just read 'reports'.
Sorry if i went on , just gets my goat when i just feel looked down ( even if not directly at me) when people say things like ' Its not right etc'