That is correct; but only if you are seeing an electrologist that follows that specific strategy.
I suppose I was the first one to showcase this (?), and this is my primary mode of operation. You CAN “bank on it!" Actually, I now only work on cases that present me with this nice option (3-clearances +): getting this finished ASAP!
If you have not been waxing, shaving, and all the hair is in the natural state, THREE clearances will render you close to 90% clear (or better), for the rest of your life. The forth clearance is often desired to render the area about 99% clear.
Those of us that use this strategy guarantee our results (if you fall into the ideal category). There are, indeed, a host of other strategies that are universally employed, and these are equally as effective. A LOT depends on your availability, where you live vis-à-vis the therapist, your own desired program and, of course, your funds available.
Whichever strategy works for you, it will cost you about the same in the final tally. Each case is specifically designed for each individual patient. There is no “one size fits all” approach to electrolysis.