I kinda just went with what the label says, one pump contains about 20mg of progesterone, so I first went one pump per breast and later doubled to two per breast. I have no idea how to do it better, with the current one as its in a tube rather than a pump bottle, I have to just approximate it, but having six months with PG and DHEA creams which both have the same pump system, its getting easier to have it close enough.
Its always a bit random with these things, I think having a syringe might help, as in try to get one full pump in a spoon for example, then pull it into a syringe and push air out to see how much it actually is. Extra work, but that could make it very accurate with little practice?
With creams we have to remember that only a certain quite small percentage of the actual stuff absorbs, so the dosages are not total, but give an idea how much becomes effective, I think Lotus mentioned somewhere about the absorbtion percentage... I'm wondering what could make it work better? I know DMSO would but that stuff is kinda scary and I would play safe and not try it. Good point about warmth, I could try the creams minute after sauna, that's way more effective than any shower when done right.