[dcdee]

there is no rule and I have a sneaky suspicion in some circumstances NBE can push beyond genetics

Julie

Genetics provide us with a general rule of thumb to provide realistic expectation of the development we will achieve.
The fact that natal women use NBE and achieve growth and development beyond what would be considered there genetically programmed max is testament to the potential power of NBE. By the same token, not all natel women achieve their developmental goal, either through metabolism issues or unrealistic expectations.
Now insert the T variable natal men have to deal with How we beat that monster into submission will determine how much development we will achieve.
So back to the question, how much development will we get?

Our development is determined by our genetics. Our genes will tell our bodies that are boobs will get so big under natural conditions.
Enter NBE or HRT or other means of introducing breast enhancing substances to our body.
Our gene also determine how our bodies react to these substances. If they did not, then there would be a one size fits all NBE program that would give everyone the boobs of their dreams. Unfortunately, everyone's metabolism is different (because of their genes. As such, we all need to seek the magic combination of NBE that will work with our metabolism to give us something close to the boobs and body modifications we are looking for.

My 2 cents any way.

Christina