hey hun dont know if this helps but I talked it over with the midwife, because Im mainly giving expressed breastmlk and breast feeding she said do the same amount as you would give formula, which for me is about 4oz give or take but if your unsure give your health visitor a ring, my poor booies are finding it hard to cope now dont know what Im going to do when the oz go up, by the way this is based on the fact that before about last week she was ona mixture of bm and formula, so I wasnt giving as many feeds ie 7-8 a day between 3-4 hours depending on whether it was bm or formula but know its defo every 3 hours not sure if this helps luv heaths
ps just bought a medela swing electric pump and omg its amazing and really helps with let down