title: Prenatal exposure to phthalate esters and PAHs and birth outcomes.
abstract: The purpose of this study was to investigate the relationship between the levels of prenatal exposure to phthalate ester and PAHs and birth outcomes among 149 Japanese pregnant women. Urinary concentrations of 9 phthalate ester metabolites, mono methyl phthalate (MMP), mono ethyl phthalate (MEP), mono-n-butyl phthalate (MnBP), mono benzyl phthalate (MBzP), mono-2-ethylhexyl phthalate (MEHP), mono-2-ethyl-5-hydroxyhexyl phthalate (MEHHP), mono-2-ethyl-5-oxohexyl phthalate (MEOHP), mono-iso-nonyl phthalate (MINP) and mono-n-octyl phthalate (MnOP) and PAHs metabolite (1-hydroxypyrene, 1-OHP) were analyzed in spot urine samples collected from pregnant women. Correlation analysis and multiple regression analysis were conducted between the concentrations of maternal urinary metabolites and birth outcomes such as birth weight, birth length, head circumference and gestational age. Creatinine-corrected concentration (geometric mean; microg/g cre) was 9.14 (MMP), 9.76 (MEP), 51.6 (MnBP), 5.62 (MBzP), 5.45 (MEHP), 10.6 (MEHHP), 11.3 (MEOHP), 0.031 (MINP), 0.025 (MnOP) and 0.121 (1-OHP). These concentrations are comparable with literature value. The relationships between prenatal exposure to phthalate esters and birth outcomes were not significant. Statistically significant negative correlation was observed between 1-OHP and birth weight, birth length and head circumstances although the correlation was insignificant when only non-smokers were included in multiple regression analysis. In conclusion, we found that prenatal exposure to phthalate esters or PAHs did not affect birth outcomes at the exposure level of the present subjects.
authors.affiliation: Department of Environmental Studies, University of Tokyo, Chiba, Japan. y_suzuki@envhlth.k.u-tokyo.ac.jp
authors.forename: Yayoi
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Mayu
authors.initials: M
authors.lastname: Niwa
authors.forename: Jun
authors.initials: J
authors.lastname: Yoshinaga
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Mizumoto
authors.forename: Shigeko
authors.initials: S
authors.lastname: Serizawa
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Shiraishi
mesh_terms: D000328:Adult; D001724:Birth Weight / Q000187:drug effects; D001827:Body Height / Q000187:drug effects; D004785:Environmental Pollutants / Q000633:toxicity / Q000652:urine*; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D018811:Maternal Exposure / Q000706:statistics & numerical data*; D010795:Phthalic Acids / Q000633:toxicity / Q000652:urine*; D011084:Polycyclic Aromatic Hydrocarbons / Q000633:toxicity / Q000652:urine*; D011247:Pregnancy; D011721:Pyrenes / Q000378:metabolism; D012044:Regression Analysis
chemical_list: D004785:Environmental Pollutants; D010795:Phthalic Acids; D011084:Polycyclic Aromatic Hydrocarbons; D011721:Pyrenes; C033146:1-hydroxypyrene