so i am wondering if it is common to pass your parents breast size when on hrt
i have read that you usually have about a cup less but my mom is a A cup so will i have have a flat chest just wondering

Your mileage may vary. Do you have sisters? How do they stack up?

Everyone's a little different, but it seems like a good predictor is the size of women in your family whom you most resemble. For me, that's my little sister, who is an A cup, and over the years, I developed basically to be about her size - not a cup less. For me, that wasn't the body I wanted, so I wound up going for breast augmentation. You probably won't wind up with nothing, but if you and your mom have similar body types, you'll probably be similar to her. But again, everybody's different.

thanks my only sis is 10 so i guess well find out what our size is at about the same time lol

Yeah, it's partly genetic but there are throwbacks; I agree that the most likely comparison is someone with an otherwise similar build, if such a person exists.

My mother is a 34B, I'm 38DD. But my mother is also very tall and slender, whereas my sister - who like me is shorter and built curvy like our paternal grandmother - is also much bigger than our mom at a D cup. Looks like we got the boob genes, and the figures, of dad's side of the family.