The high end sports bras are quite a different thing now than they used to be. But you have to find a specialty store that carries them, particularly in the larger sizes. It'll be a sports store that caters to women probably.
I'm a 36 DDD, though I can also fit a DD because I'm petit. So I'm just on the upper end of the "norm" but just above where you can find bras in the lingerie stores, and a limited selection elsewhere.
I've been pregnant and nursing for numerous years, and so I've had quite a bit of fluctuation because of that.
Honestly, if you wanted to stock up I would stock up in nursing bras.
They have more hooks to expand or contract some extra band size. You can get ones that hook up and give multiple hooks to choose from for cup size changes.
If you are truly concerned about significant size change, in a bad situation you are more likely to lose weight than gain it. You can probably estimate if you are likely to drop cup sizes significantly by feeling your breats like during a breast exam.
Some women have more fat in their breasts and these breasts are less dense. They are more prone to losing cup size.
If your breasts are denser, the glands in them are probably bigger or you have more of them. Denser breasts are less likely to lose much in the way of cup size unless you are significantly over weight. However these breasts are more likely to go up at least a cup size when engorged.
If your breasts are more fat and less dense, stock up in the cup size below yours as well.
If your breasts are more dense, don't.
If you are between normal and just barely into the obese category your band size shouldn't change so much unless you are already on the set of hooks that makes your bra snuggest.
If you are more than 50# over your ideal weight for your size, then you probably want to stock some bras down in the next band size down.


, let me know, I have yet to find
one. I too am like you, and I never did think too much of this subject until you brought it up, but it is important as I could never go without
wearing my bra either.
