How tall will your daughter be?

Growth during puberty and after periods

Quick summary

• Girls usually experience growth spurts between the ages of 9 and 15
• Growth slows down after the start of their periods, but they may grow 2 or 3 inches more
• Genetics, nutrition, sleep, physical activity, and overall health all affect final adult height

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It’s totally normal to wonder how tall your daughter will be, especially when they reach those teen years. 

Growth can feel pretty random. One month, they seem taller overnight, the next, they look like they’ve barely changed. 

A lot of it comes down to genetics, but nutrition, sleep, hormones, and overall health all play a role, too. 

Understanding what to expect can help you feel more confident supporting them as they grow, especially once they start their period.

How tall will your daughter be?

Your teens' final height is mostly influenced by the heights of their parents.

There’s a rough guide called the mid-parental height formula, which gives a ballpark figure:

• Add your teen’s mother’s height to their father's height
• Divide this number by 2
• Subtract 2.5 inches for a girl or add 2.5 inches for a boy

However, it’s important to remember it’s just an estimate. 

Some teens end up taller or shorter than expected, and that’s completely normal. 

Environment, nutrition, and lifestyle all make a difference, too, so there’s more at play than just the genes they have inherited.

How puberty affects the height of your daughter

Girls will experience growth spurts between the ages of 9 and 15. 

Puberty triggers hormonal changes, including the production of oestrogen, which affects growth plates. 

These are areas of new bone in your teen's body. The growth plates usually close at the end of puberty. 

Will your daughter still grow after getting their period?

Yes! Many parents worry that once their daughter starts their period, their growth is over – but that’s not the case.

On average, teens continue to grow for another two to three years after their first period, typically gaining around another 1 to 3 inches in height. 

However, this can vary from teen to teen.

Growth slows compared to the big spurt before menstruation, but those extra inches still make a difference!

Supporting healthy growth in your teen

You can help your teen grow with a few healthy habits:

• Balanced diet: include protein, calcium, vitamin D, and iron-rich foods for strong bones and overall development
• Regular physical activity: supports bone health and overall wellness
• Adequate sleep: growth hormone is released during sleep, making rest crucial

Many teens feel anxious comparing themselves to friends or older siblings, so open conversations about growth and puberty can be helpful. 

Although you can’t predict how tall your teen will be, using the mid-parental height formula and understanding the stages of puberty can give you an idea!

Apps like luna can be a big help, too, by offering guidance for teens who may be worrying about this.

From tracking changes to providing advice about puberty and height, it’s a supportive way to navigate these years.

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