Maternal serum dioxin levels and birth outcomes in women of Seveso, Italy.

Abstract

2,3,7,8-Tetrachlorodibenzo-(italic)para(/italic)-dioxin (TCDD), a ubiquitous environmental contaminant, is associated with increased fetal loss and reduced birth weight in animal studies. In 1976, an explosion at a trichlorophenol plant near Seveso, Italy, resulted in the highest TCDD exposure known in human residential populations. In 1996, we initiated the Seveso Women's Health Study, a retrospective cohort study of women who resided in the most contaminated areas, zones A and B. We examined the relation of pregnancy outcome in 510 women (888 total pregnancies) to maternal TCDD levels measured in serum collected shortly after the explosion. Ninety-seven pregnancies (10.9%) ended as spontaneous abortions (SABs). There was no association of log(subscript)10(/subscript) TCDD with SAB [adjusted odds ratio (OR) = 0.8; 95% confidence interval (CI), 0.6-1.2], with birth weight (adjusted beta = -4 g; 95% CI, -68 to 60), or with births that were small for gestational age (SGA) (adjusted OR = 1.2; 95% CI, 0.8-1.8). However, associations with birth weight (adjusted beta = -92 g; 95% CI, -204 to 19) and with SGA (adjusted OR = 1.4; 95% CI, 0.6-2.9) were stronger for pregnancies within the first 8 years after exposure. TCDD was associated with a 1.0-1.3 day nonsignificant adjusted decrease in gestational age and a 20-50% nonsignificant increase in the odds of preterm delivery. It remains possible that the effects of TCDD on birth outcomes are yet to be observed, because the most heavily exposed women in Seveso were the youngest and the least likely to have yet had a pregnancy.

• Authors: Brenda Eskenazi, Paolo Mocarelli, Marcella Warner, Wan-Ying Chee, Pier Mario Gerthoux, Steven Samuels, Larry L Needham, Donald G Patterson Jr
• Journal: Environmental health perspectives (Environ Health Perspect) Vol. 111 Issue 7 Pg. 947-53 (Jun 2003) ISSN: 0091-6765 [Print] United States
• PMID: 12782497 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S., Research Support, U.S. Gov't, P.H.S.)

Chemical References

• Polychlorinated Dibenzodioxins

Topics

• Abortion, Spontaneous (chemically induced)
• Adult
• Chemical Industry
• Cohort Studies
• Environmental Exposure (adverse effects)
• Explosions
• Female
• Humans
• Italy
• Maternal Exposure (adverse effects)
• Polychlorinated Dibenzodioxins (blood, poisoning)
• Pregnancy
• Pregnancy Outcome
• Prenatal Exposure Delayed Effects