Call for autopsy to unravel tragedy of stillbirth

WASHINGTON – Adding to the devastation of her daughter Clare being stillborn is the fact that Erin Fogarty Owen doesn't know why: What went wrong in a pregnancy that seemed textbook? And that unknown means Owen is facing her new pregnancy with as much fear as joy, repeating what she calls sanity sonograms for reassurance that this baby's still fine.
More than 25,000 U.S. babies a year are stillborn, and in more than a third of the cases doctors can't find an explanation. New guidelines for obstetricians aim to help change that with a too often taboo recommendation: Gently urge more parents to accept an autopsy to help unravel this mystery killer, so that maybe doctors can start preventing it.
Even an autopsy doesn't always give an answer. It didn't explain why Clare Owen died.
The hope is that if more are performed — and done better, to the same set of standards — scientists might finally have enough tests to compare and uncover risk factors that doctors today know nothing about.
"We need some answers," says Owen, of Arlington, Va. "It all starts at the bedside of the grieving parent who's just been told her baby is dead."
The new guidelines from the American College of Obstetricians and Gynecologists come as bereaved parents and child advocates are pushing to break the silence that surrounds those deaths.
"People don't want to frighten their patients near the end of pregnancy," says Dr. Ruth Fretts of Harvard Vanguard Medical Associates and the Harvard Medical School, who led the new guidelines. "So basically the issue about late stillbirth is generally not brought up. We've been afraid to talk about it."
Among Fretts' top questions: Should older and other higher-risk mothers be induced before their due dates? And some doctors order women to count their babies' kicks in late pregnancy while others don't. Should they, and what tests are needed to tell if dwindling movement means trouble or a false alarm?
"My dream of being a mother will soon be here," Owen signed off her online journal at 2:39 a.m. on March 7, 2008, while feeling early contractions.
"My God, how do I tell you the news?" is the next entry, on March 24.
She'd woken her husband, Rob, shortly after her optimistic signoff and headed for the hospital — where they almost immediately learned Clare had no heartbeat.
"My beautiful, kicking, active, hiccuping little girl was dead," she wrote, returning to her journal as catharsis.
Most at risk are black women — they have roughly twice the rate of stillbirths as other U.S. women — and mothers age 35 and older, even if they seem just as healthy as younger women. Obesity, diabetes and high blood pressure also increase the risk.
Birth defects, problems with the placenta and too little fetal growth account for many stillbirths. But there's been no progress in a decade in explaining the rest, babies like Clare Owen who appear normal despite intense testing and whose mother's only risk factor was age, 37.
Few stillbirths occur during labor in developed countries. Usually a woman has labor induced after her baby has died.
Early into hours of labor, Owen vividly remembers a comforting nurse rubbing her arm while asking her to consider an autopsy to find out what happened. Owen didn't hesitate; she needed to know.
Fretts estimates a third of mothers never get asked about an autopsy, and there's no good count of how many are done. It's a delicate issue for families who may know the procedure only from grisly TV crime shows. The guidelines stress explaining that such testing can be crucial to calculating future pregnancy risk and needed care, and is conducted with respect. Families who reject a full autopsy should be offered alternatives, such as full-body X-rays and biopsies, the guidelines say.
An autopsy isn't immediate. The Owens spent seven hours with Clare to say goodbye. Complicating the choice, insurance doesn't always pay — Owen's did — and the tab can reach $1,500.
Moreover, Fretts says most death certificates are filled out before a stillbirth assessment is completed, meaning scientists culling them for new clues never see key information.
"That isn't good enough," says Owen, frustrated that Clare's autopsy merely ruled out known stillbirth causes. The main clue was that Clare weighed almost 11 pounds, startling for slim parents. "We need to get together and come up with better answers."
To help, Sen. Frank Lautenberg, D-N.J., is writing legislation that aims to increase stillbirth research and public awareness. Also, the March of Dimes is designing a Web-based tool to one day guide women in asking relatives about miscarriages, stillbirths and other family conditions, helping doctors better determine their risk and alter prenatal care accordingly.
For now, Owen is hanging onto sympathetic care from a high-risk OB practice that allows repeated reassurance sonograms during her new pregnancy — and figuring out how to handle well-meaning "is this your first" queries from strangers.
"Do I, you know, bring this person down by saying, 'Oh no, we have one in heaven and we hope that we get to keep this one?' I can't deny Clare's existence, but it's also very uncomfortable," she says.
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EDITOR'S NOTE — Lauran Neergaard covers health and medical issues for The Associated Press in Washington.
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On the Net:
American College of Obstetricians and Gynecologists: http://www.acog.org
Stillbirth-related groups: http://www.firstcandle.org and http://www.stillbirthalliance.org

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Fewer kids have high lead levels than 20 years ago

CHICAGO – In a stunning improvement in children's health, far fewer kids have high lead levels than 20 years ago, new government research reports — a testament to aggressive efforts to get lead out of paint, water and soil.

Lead can interfere with the developing nervous system and cause permanent problems with learning, memory and behavior. Children in poor neighborhoods have generally been more at risk because they tend to live in older housing and in industrial areas.

Federal researchers found that just 1.4 percent of young children had elevated lead levels in their blood in 2004, the latest data available. That compares with almost 9 percent in 1988.

"It has been a remarkable decline," said study co-author Mary Jean Brown of the Centers for Disease Control and Prevention. "It's a public health success story."

The 84 percent drop extends a trend that began in the 1970s when efforts began to remove lead from gasoline. The researchers credited continuing steps to reduce children's exposure to lead in old house paint, soil, water and other sources.

The study was being released Monday in the March edition of the journal Pediatrics. It is based on nearly 5,000 children, ages 1 to 5, who were part of a periodic government health survey.

The government considers levels of at least 10 micrograms of lead per deciliter of blood to be elevated, although research has shown that levels less than that can still cause problems including attention and reading difficulties. There is no known "safe" level, the study authors noted.

Caroline Cox, research director of the Center for Environmental Health, a California-based advocacy group, noted that lead poisoning "is entirely preventable."

"There's no reason even one child in the United States should be poisoned by lead," Cox said. "It's great there aren't as many now as there were, but there are still too many."

By 2004, racial disparities among children with blood-lead levels higher than 10 micrograms had mostly disappeared: About equal numbers of white, black and Mexican-American children had levels in that range.

However, disparities at lower levels remained. For example, almost 18 percent of white children had levels of less than 1 microgram per deciliter, versus 11 percent of Mexican-Americans and 4 percent of blacks.

Children from lower-income families also had higher lead levels than those from wealthier families.

Dr. Bruce Lanphear, a lead specialist at Cincinnati Children's Hospital Medical Center who wasn't involved in the government study, said lead levels have probably continued to decline since 2004. But the findings show "we need to still continue to be aggressive" with prevention efforts, he said.

Lead-based paint in old housing, which can contaminate house dust and soil, is the main source. Children also can be exposed to lead in water, mostly from old plumbing pipes, as well as toys and certain folk medicines.

The CDC recommends that pregnant women and young children avoid housing built before 1978 that is undergoing renovation. Other recommendations include regularly washing children's hands and toys; frequent washing of floors and window sills, where paint dust can collect; and avoiding hot tap water for drinking, cooking and making baby formula. Hot tap water generally contains higher lead levels from plumbing than cold water.

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On the Net:

Pediatrics: http://www.pediatrics.org/

CDC: http://www.cdc.gov/

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Finding genes that make teeth grow all in a row

WASHINGTON – Ever wonder why sharks get several rows of teeth and people only get one? Some geneticists did, and their discovery could spur work to help adults one day grow new teeth when their own wear out.
A single gene appears to be in charge, preventing additional tooth formation in species destined for a limited set. When the scientists bred mice that lacked that gene, the rodents developed extra teeth next to their first molars — backups like sharks and other non-mammals grow, University of Rochester scientists reported Thursday.
If wondering about shark teeth seems rather wonky, consider: Tooth loss from gum disease is a major problem, here and abroad, and dentures or dental implants are far from perfect treatments. If scientists knew exactly what triggers a new tooth to grow in the first place, it's possible they could switch that early-in-life process on again during adulthood to regenerate teeth.
"It's exciting. We've got a clue what to do," said Dr. Songtao Shi of the University of Southern California School of Dentistry, who said the Rochester discovery will help his own research into how to grow a new tooth from scratch.
Also intriguing: All the mice born without this gene, called Osr2, had cleft palates severe enough to kill. So better understanding of this gene might play a role in efforts to prevent that birth defect, the Rochester team reported in the journal Science.
Teeth may not be visible until long after birth, but they start to form early in embryo development. Teeth ultimately erupt from a thickened band of tissue along the jaw line called the dental lamina, a band that forms in a top layer of the gum called the epithelium. Scientists have long thought the signals for tooth formation must lie in that tissue layer as well.
Not so, the Rochester team found: All the action takes place instead in a deeper cell layer called the mesenchyme.
Think of the Osr2 gene as a control switch, a kind of gene that turns on and off the downstream actions of other genes and proteins. In that mesenchymal tissue, the Osr2 gene works in concert with two other genes to make sure budding teeth form in the right spot, said lead researcher Dr. Rulang Jiang, a geneticist at Rochester's Center for Oral Biology.
"It's almost a self-generating propagation of the signal" that leads to one tooth after another forming all in a row, he explained.
Knocking that molecular pathway out of whack causes either missing or extra teeth to result, Jiang showed in a series of mouse experiments.

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Study: Old drugs might give TB a 1-2 punch

WASHINGTON – Scientists might have found a way to deal drug-resistant tuberculosis a one-two punch using two old, safe antibiotics — and studies in ill patients could begin later this year.
TB is one of the world's oldest killers, and the lung disease still claims the lives of more than 1.5 million people globally every year. The bacteria that cause TB are fast becoming impervious to many treatments, drug resistance that is seen worldwide but is a particular problem in parts of Asia and Africa. While typically the TB doesn't respond to two top treatments, an emerging threat is so-called extensively drug-resistant disease, or XDR-TB, that is virtually untreatable by remaining options.
So researchers are frantically hunting new approaches, including taking a fresh look at some old drugs.
TB bacteria contain a certain enzyme that renders the penicillin family of antibiotics drugs useless.
"It chews them up and spits them out and they never get to see their target," explained biochemist John Blanchard of the Albert Einstein School of Medicine.
But there are different antibiotics that can block that enzyme, called beta-lactamase. One, named clavulanate, has long been sold as part of the two-drug Augmentin combination that's widely used for various children's infections.
So Blanchard's team tested whether administering clavulanate might make TB vulnerable to other antibiotics — and found a combination that in laboratory tests blocked the growth of 13 different drug-resistant TB strains.
The combo: Clavulanate to drop TB's shield, plus a long-sold injected antibiotic — meropenem, part of that penicillin-style family — that then attacks the bacteria.
The findings are reported Thursday in the journal Science.
What happens in a lab doesn't necessarily work in people. Still, the findings were so compelling that two teams of U.S. researchers — from the National Institutes of Health and New York's Montefiore Medical Center — already are planning small patient studies in South Korea and South Africa. They hope to begin those studies later this year.
"It's very clever," said Dr. Anthony Fauci, director of NIH's National Institute of Allergy and Infectious Diseases. When one drug knocks out the TB microbe's defense, "that leaves the original drug with the capability of doing what it's supposed to be doing."

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