|Title:||Exposure to a Mixture of Polychlorinated Biphenyls and Polychlorinated Dibenzofurans Resulted in a Prolonged Time to Pregnancy in Women||Authors:||Yang C.-Y.
Yue Leon Guo
|Keywords:||Fertility; Infertility; PCBs; PCDFs; Polychlorinated biphenyls; Polychlorinated dibenzodioxins; Polychlorinated dibenzofurans; Pregnancy; Reproduction; Time to pregnancy||Issue Date:||2008||Start page/Pages:||599-604||Source:||Environmental Health Perspectives||Abstract:||
Background: Polychlorinated biphenyls (PCBs), dibenzofurans (PCDFs), and dibenzodioxins (PCDDs) may affect the female reproductive system in animals and humans. In 1978-1979, a mass poisoning occurred in central Taiwan due to PCB/PCDF-contaminated cooking oil; this incident was called Yucheng ("oil disease" in Chinese). Objective: The purpose of our study was to determine whether PCB/PCDF exposure affected fertility in exposed women. Methods: After the event, we followed the exposed individuals and a reference group who were sex-, age-, and community-matched. In 2003, we obtained fertility histories from Yucheng and reference women by telephone interview. We used Kaplan-Meier survival curves and multi-variable Cox regression to compare time to pregnancy (TTP) between Yucheng and reference women, and we performed multiple logistic regression to determine whether PCB/PCDF exposure caused infertility. Results: In total, 412 women responded, with a median TTP of 4 months in Yucheng women and 3 months in reference women (p = 0.019). After adjusting for confounders by Cox regression, we found a fecundability ratio of 0.90 [95% confidence interval (CI), 0.80-1.00] for Yucheng women. Among the 408 women who, had noncontoceptive sexual activity for > 12 months, 19.7% of Yucheng women and 9.7% of reference women did not become pregnant (i.e., they were infertile). After we adjusted for confounders by logistic regression, the infertility odds ratio was 2.34 (95% CI, 1.23-4.59) for Yucheng women compared with the reference group. Conclusions: We found prolonged TTP and reduced fertility among women previously exposed to PCBs/PCDFs. Because of the limited sample size and the relatively small decrease in the fertility rate, these effects require cautious interpretation and further investigation for confirmation.
|URI:||http://ntur.lib.ntu.edu.tw//handle/246246/160917||DOI:||10.1289/ehp.10715||SDG/Keyword:||dibenzodioxin derivative; polychlorinated biphenyl derivative; polychlorinated dibenzofuran; adult; article; controlled study; environmental exposure; female; female fertility; female infertility; health survey; human; interview; major clinical study; pregnancy rate; priority journal; sexual behavior; sexual intercourse; Taiwan; Animalia
|Appears in Collections:||環境與職業健康科學研究所|
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