OMG
I was almost done with my post...
And it deleted because I did 'undo'...
On top of that it took a full 5-10 minutes to even create an account for so many verifications...
Awesome!
So I am a little irritated, but really want to know WHAT IS THE PROVEN ANSWER.
I get all of our bodies are different (blah, blah, blah)... 
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Here are the things I've tried and spent a lot of money on with NO results.
fennel teas / fenugreek teas / red clover teas
fennel / fenugreek / red clover / saw palmetto tinctures
fennel / fenugreek / saw palmetto pure oil and diluted red clover oil for breast massage
making my own puerari mirifica oil / taking PM capsules
fenugreek / fennel powders organic in bulk from SWB
anddddd.....
fresh red clover / raspberry leaf teas.
After NO LUCK, I am waiting on one more product from Murifica Sciences for a PM oil... that took over a month to arrive 
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I am no considering wild yam powder in place of full fat soy flour (per one BN post)
As I don't want to use soy due to thyroid problems it can cause...
And gelatinized red maca root powder in my smoothies.
I will note, I think I started seeing SOME fullness BEFORE I started bHRT with Winona, a cream, and DHEA (15 mg) prescription...
before that I did see more fullness, but not since being on them.
So I was going to try to use the GRMP and the WYP in my smoothies. I will also apply flaxseed oil to breasts, and use ground flaxseed in smoothies.
TBH with this entire site, it seems ONE WOMAN I say that specifically to a woman's body biologically, otherwise it is truer we are all diff, meaning if a man and woman are attempting to grow breasts, the process is going to vary between 2 biological sexes of origin, vs. woman to woman
so at this point, it seems there would be a FOOL PROOF method of growing breasts naturally.
I know and believe nature provides a remedy for every concern for humans on the planet.
There has to be an actually proven protocol for breast growth.
I am going to start trying this, just curious!
Has anyone done this successfully at 45 with a small A cup? I am not totally flat, but they are def not plump.