Does breast growth rate determine breast size?

Question

I am 17 and my breasts have been growing extremely slow over the past 2-3 years. (I saw my first period at 15). I believe I have reached a small B cup but I can’t determine it yet (as the model of 32B bralette I bought is not filled on the outside parts). I was an A cup for the last 2 years but I can say that I was filling it more and more over the years (at the beginning my breasts looked emptier, now they are a bit fuller and rounder but I still feel like they are empty). I have a weird question about my breast growth. The inside parts are flat but on the outside my breasts are fuller. When I am sleeping, I lay on my chest. I am not sure if that causes a problem in their growth but is that the reason they grow in that state?
My sister has grown as much breast as I got now (from A cup to B cup) in just 1 year and she is 14 (she saw her first period at 12-13 (can’t remember 😂). So... I wonder. Are my breasts going through certain stages one by one? I don’t know exactly but I guess for example, first the middle, then the outside parts, then the top part and the inside part? Or should they grow all together?

Answer

I was an A/B cup until I was 19, then shot up to a C cup... then around 21 I went to DD, and about a year ago I grew again and became DDD. Right now I'm still DDD/G but thats because of pregnancy hormones. But normally I'm already DDD just slightly smaller number. It took forever for my boobs to grow and now I'm like how do I return them 😂😂😂 Yours will probably keep growing, breasts go through changes throughout your early 20s.

Answer

When I was about 13 I was a AAA/AA, so reeeeeally small lol. Then the summer going into high school I went up to a B & stayed that way for about 2 years. Then I hit 16/17 & all of a sudden I was a DD & stayed that way til 23 then I had my son & even after stopping breastfeeding I became a DDD. Some people are late bloomers & yo will probably still grow or change shape, give it time :)

Answer

Everyone’s body does it’s own thing. Breasts are interesting though. People talk about how they grow in your teen years, but they keep grow and changing throughout your 20s too. I’m 30 now. When I was your age my boobs were A/B cups. By my early 20s, they were B cups and stayed that way until around 26-27 when they grew/changed again. Now they are C cups. I didn’t gain weight or have a baby or any of those things. My body just changed again, and I was not expecting that to happen in my late 20s. When I talked to my friends, they all mentioned being surprised by a similar thing because no one ever mentioned it. I say all of that because how your boobs look or grow right now doesn’t determine how they will be in the future. Your body will keep doing its thing.

Does breast growth rate determine breast size?

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