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Researchers find process of cervical ripening differs between term and preterm birth
Date:6/20/2011

DALLAS June 21, 2011 Cervical ripening that instigates preterm labor is distinct from what happens at the onset of normal term labor, researchers at UT Southwestern Medical Center have found.

The findings challenge the conventional premise that premature cervical ripening and remodeling is likely just an accelerated version of the term labor process, and that normal term ripening is caused primarily by activation of inflammatory responses.

Cervical remodeling is the process by which the cervix is transformed to open sufficiently during the birth process.

"Premature cervical remodeling can occur by more than one mechanism and is not necessarily an acceleration of the physiologic process in term labor. Depending on the cause of preterm birth, that mechanism can vary," said Dr. Mala Mahendroo, associate professor of obstetrics and gynecology and the Cecil H. and Ida Green Center for Reproductive Biology Sciences at UT Southwestern, and senior author of the study published in a recent issue of Endocrinology.

The study has been selected by the Faculty of 1000 an international group of more than 10,000 leading scientists and researchers to be in its top 2 percent of published articles in biology and medicine.

Previous studies suggest that in term or preterm labor, white blood cells influx into the cervix and release enzymes that break down tissue support and remodel the cervix, allowing a baby to pass through the birth canal. That's only half-right, researchers in this investigation report.

"The immune system or inflammatory response is sufficient to cause cervical ripening, but it's not absolutely necessary for it to happen," said Dr. Brenda Timmons, research scientist in obstetrics and gynecology and co-lead author of the study.

Nearly 13 percent of all births in the U.S. are preterm. Premature infants can suffer respiratory distress, intraventricular hemorrhage and even cerebral palsy. Id
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Contact: Robin Russell
robin.russell@utsouthwestern.edu
214-648-3404
UT Southwestern Medical Center
Source:Eurekalert

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