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.”

Recent Headlines

in Entertainment

Today in entertainment history: Oct. 23

Fresh
strait

A look at the Hollywood headlines that went down in history.

in Local Sports

Rookie Randle leads Lakers past Blazers

Fresh
Portland Trail Blazers head coach Terry Stotts calls in a play against the Atlanta Hawks in the second half of their NBA basketball game Thursday, March 27, 2014, in Atlanta. Portland won 100-85.

Rookie Julius Randle scored 11 of his 17 points in the fourth quarter in the Los Angeles Lakers' 94-86 victory over the Portland Trail Blazers.

in Sports

AP source: Goodell told to testify in Rice appeal

Fresh
NFL Commissioner Roger Goodell pauses as he speaks during a news conference Friday, Sept. 19, 2014, in New York. Goodell says the NFL wants to implement new personal conduct policies by the Super Bowl. The league has faced increasing criticism that it has not acted quickly or emphatically enough concerning the domestic abuse cases. The commissioner reiterated that he botched the handling of the Ray Rice case.

A person familiar with the case has told The Associated Press that an arbiter has ruled that NFL Commissioner Roger Goodell should testify in Ray Rice's appeal of his indefinite suspension.

in Sports

Royals beats Giants 7-2, even World Series 1-all

Fresh
Kansas City Royals pitcher Yordano Ventura throws in the first inning of a baseball game against the Chicago White Sox at Kauffman Stadium in Kansas City, Mo., Wednesday, Sept. 17, 2014.

The Kansas City Royals beat the San Francisco Giants 7-2 Wednesday night to even the World Series at one game apiece.

in Sports

Vegas police probe complaint against Blake Griffin

Los Angeles Clippers forward Blake Griffin put the ball to his face as he reacts to being called for a foul against the Sacramento Kings during the second half of an NBA basketball game in Los Angeles, Saturday, April 12, 2014. The Clippers won 117-101.

Police are investigating a man's allegation that Clippers star Blake Griffin attacked him in a Las Vegas nightclub during the weekend.