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Why Are My Breasts Developing Sooner Than When My Mom's Did?

Published: May 02, 2017
Dear TeenHealthFX,
I am 10 almost 11 and I started breast development when I was 9 1/2. My mom started breast development when she was 14, so why could this be?
Signed: Why are My Breasts Developing Sooner Than When My Mom's Did?

Dear Why are My Breasts Developing Sooner Than When My Mom's Did?,

While parents and their biological children are going to have certain genetic similarities, they are not going to be genetically identical. A short woman could give birth to a daughter who grows up to be very tall. A woman with brown eyes could give birth to a daughter with blue eyes. And a woman whose breasts started to develop at 14 could give birth to a daughter who ends up developing at a younger age.

When it comes to puberty, pre-teens and teens will not develop at the exact same rate as all of their peers. And they will not necessarily develop at the exact same rate as their parents did either. This is perfectly normal and is nothing to be concerned about. Starting breast development at 9 ½ is also totally normal.

If you have any questions or concerns about the changes your body is going through, TeenHealthFX suggests you speak to your mom or your doctor during your next well visit. Girls who develop at a younger age might also find they are dealing with various emotional reactions to the changes going on with their bodies. If this is true for you, FX definitely suggests that you speak to someone about it, such as your mother, your school nurse, your doctor or any other trusted adult who can give you the support and guidance you need.  

Signed: TeenHealthFX

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