Could someone please explain to me why one breast will let-down and 7-10
minutes later the other will let-down during double pumping.  Mom has
been pumping with no problems for 1 month and in the last week noticed
that the breasts weren't letting down at the same time.  No clothing
restrictions.  She will start to pump and feels the MER.  Left breast
flows beautifully, right breast squirts a little.  After she collects 4
oz. from the left, she switches to singal pumping on the right and then
collects almost 4 oz.  Pumping pressure feels even to her.  Could this
be a circulation problem of some sort?  I'm lost with this one.

It's not enough to get flow going at the glandular level with a hit of
oxytocin, milk has to get past the gatekeeper, the nipple sphincter
muscles, which can be contracted tighter on one breast than another, and so
respond differently. Try warming the right breast and see if that improves
things. Then there's the possibility of different muscular tension because
of posture of double and single pumping,and probably a chirpracter would
suggest the possibility of nerve blockages in different postures too. Who
knows? But we aren't symmetrical in many ways, so it's to be expected
there'll be puzzles like this. What does anyone else think? Where's our
biomechanical engineers? Maureen.