I'm not sure how to pose my question for the archives so I am having difficulty finding the answer. What I am wondering is, whether there is evidence that for some women, hormonal fluctuations while breastfeeding prior to the onset of menses, play a role in milk supply. In other words, could a woman have a cyclical intermittent dip in supply, prior to any ovulation or menstruation? Do some women produce enough estrogen to temporarily tamp down supply? In the absence of all other explantions for a dip in supply, would the prudent thing be to advise a Ca/Mag supplement? I am also wondering if what sometimes appears to be a growth spurt could actually be a baby's response to a temporary dip in supply. Anybody know of any studies? Thanks, Kathy Lilleskov RN IBCLC *********************************************** Archives: http://community.lsoft.com/archives/LACTNET.html Mail all commands to [log in to unmask] To temporarily stop your subscription: set lactnet nomail To start it again: set lactnet mail (or [log in to unmask]) To unsubscribe: unsubscribe lactnet or ([log in to unmask]) To reach list owners: [log in to unmask]