I did try that awhile ago, but couldn't stick with it to see if it worked. While I was pumping, LO would just SCREAM BLOODY MURDER, which I think had a negative effect on let down! :-( For awhile I got okay results pumping at night (once she dropped all those feeds), but eventually I went from getting 2oz there to about 1/4oz after 30 minutes. I was staying up late to pump 1/4oz and eventually gave that up last week.