Hi there - I'm new here and I know there are loads of threads about weaning and baby's age both here and in the breastfeeding section but I can't seem to put my finger on exactly what I need advice on... My baby is now 12 weeks - fine in every way except he hasn't put on more than a couple of ounces in the last four weeks. HV says we may need to add formula to his breastfeeds but I'm really puzzled as to why this is happening as he is generally fine (apart from a bit of a cough following a cold), seems happy, and up until four weeks ago was gaining loads. He was big (9.5 pounds) at birth and the only things that have changed are that he's now sleeping from 10 ish until 7 ish (so has dropped his 4am feed) and the fact that I am expressing a bit every day so my husband can do the late feed and so that I can store some milk for when I go back to work. Could I have reduced my milk supply through these two factors so much that I'm no longer providing enough? Any advice appreciated