News

American girls really are growing up faster

American girls really are growing up faster

GROWING UP TOO FAST: American girls are growing up faster, a new study shows. Photo: clipart.com

By Genevra Pittman

NEW YORK (Reuters Health) – Girls are developing breasts at younger and younger ages, a new study confirms. And upward trends in childhood obesity seem to be playing a major role.

Researchers found African American girls started getting breasts just before they turned nine, on average. Among white girls the average age was about nine and a half – a few months earlier than in the 1990s.

The findings “confirm an ongoing downward trend in pubertal timing among U.S. girls,” said Dr. Anders Juul.

“It’s been worrying for the U.S. as well as the rest of the world,” Juul said. He heads the Department of Growth and Reproduction at Rigshospitalet in Copenhagen, Denmark, and wasn’t involved in the new report.

The data come from a long-term study of more than 1,200 girls in and around San Francisco, Cincinnati and New York City. Girls were enrolled in the study between ages six and eight and followed with annual or semi-annual visits.

At each visit, staff assessed breast development using Tanner stages, which measure how far along a young person is in puberty.

African American girls first showed signs of breast development at eight years, 10 months, on average. That compared to nine years, four months among Hispanic girls and nine years, eight months among white and Asian girls.

For white girls, puberty hit about four months earlier than in a 1997 study that also measured breast development. That study concluded girls were entering puberty earlier than in the past.

Heavier girls tended to start developing at younger ages. Rising obesity rates seem to be a “prime driver” behind breast development starting earlier, Dr. Frank Biro and his colleagues wrote Monday in Pediatrics.

Still, Juul’s own work has suggested obesity isn’t behind earlier breast development among Danish girls.

Researchers said how much exercise girls get, diabetes precursors and chemicals in the environment that can mimic hormones may all play a role in pushing up the onset of puberty.

“One of our challenges is going to be, there are literally hundreds of chemicals that could be candidates,” Biro said. He works in the adolescent medicine division at Cincinnati Children’s Hospital Medical Center in Ohio.

Where girls live, meat and dairy in their diets and family stress have also been tied to earlier development, Marcia Herman-Giddens wrote in a commentary on the report. She studies maternal and child health at the University of North Carolina at Chapel Hill.

The study didn’t look at when girls started getting their periods, or at other measures of puberty.

The researchers said maturing at a younger age could come with long-term risks for some girls.

For instance, those who hit puberty earlier could be at higher risk of breast and other cancers because their bodies spend more years making and being exposed to estrogen.

They also tend to start having sex or using drugs and alcohol at younger ages and are more likely to become depressed or develop low self-esteem.

“You’ve got a 10-year-old who looks like a 14-year-old. We interact with kids based on the way that they look,” Biro said. “Kids interact with each other that way also.”

“One of the things the parents of these early maturing kids need to do is they need to monitor them more closely,” he told Reuters Health. That includes talking about sex earlier.

But Juul said parents shouldn’t be overly worried. The data about early puberty and problems down the line come from studies that asked women when they first got their period, he said.

That typically happens two to four years after breasts start developing. And it’s unclear whether that age is dropping at the same pace as the age of breast development, Juul said.

“I think the scary part is not (for) the actual girl, because we don’t know what it means for her,” he told Reuters Health. “It is a warning that something is influencing our child population and it calls for concern and continued studies.”

What's On 'KLH?

9th Annual STICKY FINGERS

StickyFingers2014_KLH_int_wp

Sample and judge the best BBQ, Chili, Wings, Dessert and Cheesy creations at the Waukesha Expo on Sunday, Oct 5th!

Hire Me MKE

HireMeMKE_620x400

Looking for a job around the Milwaukee area? Check out some openings>>

Wanna Play DJ?

HEYMOM

You can host your own show Sunday night at 6 on ‘KLH!

Recent Headlines

in Sports

Browns WR Gordon suspended for 2014 season

browns

Browns star wide receiver Josh Gordon has been suspended by the NFL one year for violating the league's substance abuse policy.

in Music

Motley Crue stars mock Justin Bieber’s antics

vinceneilnikkisixx

Vince Neil and Nikki Sixx say the "Baby" hitmaker's attempts to be a "bad boy" are lame.

in National

Military: Jet in Virginia crash based in Massachusetts

fighter

DEVELOPING: An Air Force F-15C has crashed in the mountains of western Virginia and the pilot's status is unknown.