i
Urinary Concentrations of Phthalate Metabolites in Relation to Pregnancy Loss among Women Conceiving with Medically Assisted Reproduction
-
Nov 2016
Source: Epidemiology. 27(6):879-888.
[PDF-372.12 KB]
Details:
-
Alternative Title:Epidemiology
-
Personal Author:
-
Corporate Authors:
-
Description:Background
Animal studies demonstrate that several phthalates are embryofetotoxic and are associated with increased pregnancy loss and malformations. Results from human studies on phthalates and pregnancy loss are inconsistent.
Methods
We examined pregnancy loss prospectively in relation to urinary phthalate metabolite concentrations among women undergoing medically assisted reproduction. We used data from 256 women conceiving 303 pregnancies recruited between 2004 and 2012 from the Massachusetts General Hospital Fertility Center. We quantified eleven phthalate metabolite concentrations and calculated the molar sum of four di(2-ethylhexyl) phthalate (DEHP) metabolites (ΣDEHP). We estimated risk ratios (RRs) and 95% confidence intervals (CIs) for biochemical loss and total pregnancy loss (<20 weeks’ gestation) across quartiles using repeated measures log-binomial models, adjusted for age, body mass index, smoking and infertility diagnosis.
Results
Of the 303 pregnancies, 83 (27%) ended in loss less than 20 weeks’ gestation and among these, 31 (10%) ended in biochemical loss. Although imprecise, the RRs for biochemical loss increased across quartiles of ∑DEHP and three individual DEHP metabolites. For ∑DEHP, the RRs (CIs) were: 2.3 (0.63, 8.5), 2.0 (0.58, 7.2), and 3.4 (0.97, 11.7) for quartiles two, three and four, compared to one, respectively (p-trend=0.04). RRs for total pregnancy loss were elevated in the highest quartiles of ΣDEHP and three DEHP metabolites. The remaining seven phthalate metabolite concentrations evaluated were not associated with either outcome.
Conclusions
We found a suggestive pattern of association between conception cycle-specific urinary concentrations of DEHP metabolites and biochemical and total pregnancy loss among women undergoing medically assisted reproduction.
-
Subject:
-
Source:
-
Pubmed ID:27299194
-
Pubmed Central ID:PMC5248552
-
Document Type:
-
Funding:
-
Place as Subject:
-
Collection(s):
-
Main Document Checksum:
-
File Type:
Email
CDC-INFO
