Hi Shoshy,
You have completly lost me as to why you would want to give an infusion of rosemary. Get Mum to express a load of milk first and put in the fridge or freeze and then give the Ledum. Let the babay have a feed directly after as the Ledum would not have got through to the milk so fast and then let the baby have the expressed milk out of a bottle for a day or so. It's a thought!!

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RSHom - Registered Homeopath