Persistent organic pollutants, pre-pregnancy use of combined oral contraceptives, age, and time-to-pregnancy in the SELMA cohort

Environmental Health : a Global Access Science Source
Richelle D BjörvangCarl-Gustaf Bornehag

Abstract

We are exposed to several chemicals such as persistent organic pollutants (POPs) in our everyday lives. Prior evidence has suggested that POPs may have adverse effects on reproductive function by disrupting hormone synthesis and metabolism. While there is age-related decline of fertility, the use of hormonal combined oral contraceptives (COCs) and its association to return of fertility remains controversial. The goal of this study is to investigate the association between exposure to POPs, both individually and as a mixture, and fecundability measured as time-to-pregnancy (TTP) according to pre-pregnancy use of COCs and age. Using the SELMA (Swedish Environmental Longitudinal Mother and Child, Allergy and Asthma) study, we have identified 818 pregnant women aged 18-43 years (mean 29 years) with data on how long they tried to get pregnant and what was their most recently used contraceptive method. These data were collected at enrollment to the study (median week 10 of pregnancy). Concentrations of 22 POPs and cotinine were analyzed in the blood samples collected at the same time as the questions on TTP and pre-pregnancy use of contraceptive. Analyses were done on the association between POPs exposure and TTP measured as continuo...Continue Reading

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Citations

May 5, 2021·Environment International·Richelle D BjörvangPauliina Damdimopoulou
Jul 3, 2021·International Journal of Environmental Research and Public Health·Aleksandra FucicJohn E Vena
Jul 14, 2021·Toxicology and Applied Pharmacology·Violet KlenovAileen F Keating

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Methods Mentioned

BETA
contraception

Software Mentioned

ggpubr
ggplot2
R
RStudio
gWQS
SPSS Statistics
reshape2

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