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I have always frowned on the use of dummies, because my mother (who ran a nursery for 25 years) was adamant that they can hinder a child's speech development.

Our new baby is very unsettled and very collicy, and the midwife is recommending using a dummy to help settle him.

So, is there any evidence behind this claim that it hinders speech development? And if so, what is the age that it starts making a difference?

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Our baby was collicy for the first month or so. We would do anything to calm her that seemed harmless. (No Cognac, though.) Giving that virtually every child uses a dummy, I think the small risk that it hinders development is worth taking if it calms her. It'll also help save your nerves. – Dave Clarke May 28 '12 at 15:00
@Mathew Foscarini. Yes "dummy" is the normal word in England. – Urbycoz May 29 '12 at 7:16
@MathewFoscarini: And Australia. – Dave Clarke May 29 '12 at 19:22
Dummy just means 'not the real thing', just like a crash test dummy or a ventriloquist's doll. As for your question, colic will pass, and when it does, you can begin to give your baby the dummy only during nap/sleep times. There's plenty of time until speech begins. – Ana May 30 '12 at 18:19
In the US we also call a pacifier a binky. – bonomo Nov 8 '12 at 7:34
up vote 16 down vote accepted

I remembered reading that recent pediatric research in the US has said that pacifiers are OK. I looked at some recent papers and found these:

I would summarize these papers as saying pacifiers are good for infants below 6 months of age, bad for children over 3 years of age, and neutral for children aged 6 months to 3 years.

edit: I realized I didn't actually answer your specific question. I found no papers at all on the subject of pacifiers and speech development, which implies that the concern is not considered credible by current pediatricians.

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+ 1000: Great list of up to date sources, and intelligent analysis of the relative data. – deworde May 30 '12 at 15:32

This is my opinion, not a study, but I suspect the statement is related to awake/play time, not rest and sleep. By 6 months your baby should move past the collic phase and so either no longer require the dummy/pacifier or only need it for sleep.

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