It seems very likely that your baby's constipation is due to the soya formula.It is really difficult to be sure about the exact cause of her abdominal discomfort and colic previously, but she may have lactose intolerance as she is better after being taken off a cow's milk formula.It is worthwhile trying her on one of the new lactose free formulas such as NAN LF and seeing if she is less constipated and happier.
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