Woman, 23, has a rare condition which means she only grew one breast

Becca Butcher, 23, from Barnsley, South Yorkshire, has Poland Syndrome, which means one breast is significantly smaller than the other - her right one is a D cup while the left is an A cup.

Rare condition has made woman the world's most prolific mother

Woman baffles doctors by only growing one boob through puberty - Daily Star

Are women's breasts getting bigger - or is it just our bras?, Women

Young woman born with medical condition develops just one breast

Woman baffles doctors by only growing one boob through puberty - Daily Star

Why Is One Breast Bigger Than the Other?

Woman, 23, has a rare condition which means she only grew one

Why Aren't My Breasts Sore or Growing During Pregnancy?

Breast development: Stages and how to spot growth signs - Flo

Woman's rare condition causes breasts to grow four bra cup sizes in one year - causing crippling back pains - Belfast Live

Mum who suffers from Poland syndrome wants NHS surgery on her different size breasts

Rare condition causes woman's breasts to grow four bra cup sizes in just one year - and they won't stop growing

My boobs won't stop growing — I have a rare condition

Is it normal if my one breast is slightly bigger than the other?

My M-sized boobs won't stop growing because of a rare condition