Hi, Toby Gish! Great to see you've joined the wonderful world of Lactnet - now I can save on my phone bills as well as not keep you up past your bedtime! Why do you want to "measure engorgement"? If I understand correctly, you "want to avoid subjective evaluations", because you've found (as I have) that most moms get fullness confused with engorgement. I prefer the idea of simply explaining the clinical difference between the two to moms, do not feel need for quantification. Or are you researching and because of this want to quantify? Judy Knopf in Beer Sheva, Israel