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Ethnicity Can Impact Progress And Pain In Labor

 PARK RIDGE, IL Results from a clinical study presented at ANESTHESIOLOGY 2010 suggest that a women’s labor experience is tied to her ethnicity as well as genetics.

The study found differences in the receptor that controls uterine muscle contractions, the beta-2-adrenergic receptor (B2AR genotype C at the 27 position), which predicted later transition to active labor. This genetic difference is common in Asian women and may account for findings that Asian women transition to active labor later. Black women had slower early stage labor, which could last over 36 hours. Heavy women also had much slower early labor. Epidurals were generally associated with a 30 percent longer labor time.

“We do not believe that the epidural actually slows the labor, but rather patients who are having a slower, difficult labor ask for an epidural earlier,” said Elena Reitman, M.D., lead author of the study and Post Doctoral Clinical Fellow in Obstetrical Anesthesiology at Columbia University Medical Center.

Regarding pain levels, the study identified the mother’s sensitivity to cold was correlated with increased labor pain. Researchers hypothesized that the cold difference might be due to differences in a receptor on the uterine muscle that detected both cold and pain. The study’s model predicted that women who require instrumental (such as forceps) vaginal delivery start off with more pain possibly because the baby’s head is not in the most common presentation which is head-down, facing the mother's back, with its chin tucked to its chest and the back of the head ready to enter the pelvis.

About the Study
The study prospectively enrolled 150 pregnant women from a single private practice who were near the time of giving birth. The researchers studied heat, cold and pressure threshold in the third trimester and all relevant labor and delivery information from electronic medical records, including: cervical dilation, pain scores and labor management data (labor progression medication and pain medication treatment use). The researchers also performed DNA testing on the patients. Two separate mathematical models were created for labor progress and labor pain. The significances of covariates such as genetic background, maternal weight, and ethnicity were tested with software that allows researchers to identify the effects of maternal characteristics that influence the time course of labor and degree of labor pain with high degrees of statistical significance.

“We hope that the models that we created will allow women and their doctors to predict how fast or painful labor will occur so that they can make more informed choices about delivery,” said Dr. Reitman.

The American Society of Anesthesiologists
Anesthesiologists: Physicians providing the lifeline of modern medicine. Founded in 1905, the American Society of Anesthesiologists is an educational, research and scientific association with 45,000 members organized to raise and maintain the standards of the medical practice of anesthesiology and improve the care of the patient.


STORY TAGS: BLACK , AFRICAN AMERICAN , MINORITY , CIVIL RIGHTS , DISCRIMINATION , RACISM , NAACP , URBAN LEAGUE , RACIAL EQUALITY , BIAS , EQUALITY, WOMEN , MINORITY , DISCRIMINATION , DIVERSITY , FEMALE , UNDERREPRESENTED , EQUALITY , GENDER BIAS , EQUALITY, HISPANIC , LATINO , MEXICAN , MINORITY , CIVIL RIGHTS , DISCRIMINATION , RACISM , DIVERSITY , LATINA , RACIAL EQUALITY , BIAS , EQUALITY, NATIVE AMERICAN , INDIAN , NATIVES , MINORITY , CIVIL RIGHTS , DISCRIMINATION , RACISM , DIVERSITY , RACIAL EQUALITY , BIAS , EQUALITY



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