For a lot of us, the puberty conversation starts and ends with periods and bras. But there’s a lot more going on, and it’s starting earlier than most parents expect.

If you have a daughter who’s heading into puberty, or already in the middle of it, this is a conversation worth hearing.

In this episode, I sit down with Dr. Melisa Holmes, MD, a board-certified OB-GYN with more than 25 years of experience in pediatric and adolescent gynecology, co-founder of Girlology, and co-author of Youology: A Puberty Guide for Everybody, to talk about what’s really happening with puberty in girls today.

As a mom of three daughters myself, this conversation gave me language I wish I’d had years ago. I think it will for you, too.

Dr. Holmes starts with the basics: puberty isn’t just breasts and periods. It’s a five-to-seven-year process guided by hormones, starting with breast buds in about 85% of girls (hair growth first in the rest), and continuing well past the first period with more growth and brain development still to come.

Then we get into the data on early puberty. The average age of breast development was about 11 in 1977; today it’s nine to ten, decreasing roughly three months every decade. Dr. Holmes walks through what’s driving that trend: rising rates of childhood obesity (body fat itself releases hormones tied to pubertal development), less nutrient-dense food, endocrine disruptors (which help explain earlier puberty even in thin girls), chronic stress, and lower activity levels.

We talk about what earlier maturation means emotionally and socially for girls, including poorer body image, earlier sexualization, and riskier peer associations, plus the specific risks of adultification that affect Black girls disproportionately. Dr. Holmes is also direct about one of the most common mistakes well-meaning adults make: commenting on a girl’s body, including moms critiquing their own.

We cover what girls should actually know before their first period (what it looks like, what it feels like, and that pain shouldn’t be normalized), why Dr. Holmes considers a period a vital sign rather than a monthly inconvenience, and the connection between the menstrual cycle, estrogen, and bone health during the adolescent years when girls are laying down most of their lifetime bone density.

For families with athletic daughters, we get into RED-S, or Relative Energy Deficiency in Sport. When a period disappears during heavy training, that’s the body signaling it doesn’t have enough fuel, not something to celebrate. Dr. Holmes also explains how to find a pediatric and adolescent gynecologist, and what conditions like PCOS, endometriosis, and PMDD can look like in teens.

She also debunks some of the most persistent myths about hormones and mood, and shares three specific things parents can do right now to support a daughter through puberty.

This is one of those episodes I wish every parent of a daughter could hear before puberty starts, not after.

In This Episode, We Cover:

• What puberty actually involves beyond breasts and periods
  
• Why puberty is starting earlier in girls, and what’s driving the trend
  
• How earlier puberty affects body image, peer relationships, and emotional development
  
• Why a period is a vital sign, and what to watch for when it stops or never shows up
  
• What girls should know before their first period
  
• The connection between nutrition, bone health, and the menstrual cycle
  
• RED-S (Relative Energy Deficiency in Sport) and what it means when a period disappears during heavy training
  
• When period pain isn’t normal, and when to seek care
  
• How to find a pediatric and adolescent gynecologist
  
• The myths about hormones and mood that keep circulating, and three things parents can do right now

Be sure to listen to the full episode:

Resources & Links

• Girlology: girlology.com
• Book: Youology: A Puberty Guide for Everybody by Dr. Melisa Holmes
• Instagram: @girlology
• Group Program: Raise a Child Who Thrives
• Newsletter: The Munch