When 1st side EMPTY
Until you're skilled at nursing, "finish the first side first.
" in a letdown, the foremilk is hi in lactose
, the hindmilk hi in fat. Babies need both. Many babies who feed both sides get only the foremilk on each side, ie. Twice the lactose (=gassiness) and hardly any of the fat (=starving again 10-30min later).
See article @ http://www.Llli.Org/llleaderweb/lv/lvsepoct95p69a.Html