The first sign of puberty in those born with 2X chromosomes is generally breast bud development, usually occurring between the ages of 8-13. This can happen after the changing of body odor or concurrently. The average of starting puberty is around 8-9 years, with girls hitting puberty before boys. As others around them start to experience changes around this timeframe, it is important to educate your child about what is to come, what it means, & answer questions they have. We recommend having a talk with your child around 7-8 years of age.

So, what should you mention when you talk about breast development & bras?

Remind them this is normal: breasts come in all shapes, sizes, & change over time. Everyone develops differently, so stress that just because they feel bigger, smaller, or asymmetrical does not mean they are not normal.

The major types of bras that you will need to explain and introduce your child to are: 

1.     Training bras are great to start off with. It helps your child get used to wearing one while they do not fit into the cups of standard bras yet.

2.     A soft cup/unwired bra is a great option for smaller breasts and for those wanting comfort.

3.     A wired bra offers more support, sometimes a good option for those with larger breasts.

4.     A sports bra is great for those participating in school sports or physical activities.

In terms of sizing, this is a bane for even adults to know. The number is the band size, a rough measurement of circumference around the bust area where the bra sits (with some additions). The letters refer to the cup size, with AA being the smallest, then A, up to D, then DD, up to H commonly. There are many bra calculating guides online that you can to calculate so you have an idea of which ones to try on.

As your child grows, their size will increase as well, so it is important to make sure they feel their bra fits and supports well. Sometimes, bra fittings are a good way to help ensure you are wearing the right size!

Don’t forget to check out our YouTube video on Puberty in Girls for an in-depth look, including periods, body hair, and growth during this time.