title: International studies of prenatal exposure to polycyclic aromatic hydrocarbons and fetal growth.
abstract: OBJECTIVE
  Polycyclic aromatic hydrocarbons (PAHs) are ubiquitously distributed human mutagens and carcinogens. However, lack of adequate air monitoring data has limited understanding of the effects of airborne PAHs on fetal growth. To address this gap in knowledge, we examined the association between prenatal exposure to airborne PAHs and birth weight, birth length, and birth head circumference, respectively, in Krakow, Poland, and New York City (NYC).
  
  
  METHODS
  The parallel prospective cohort studies enrolled nonsmoking, healthy, and nonoccupationally exposed women and their newborns. Personal air monitoring of pregnant women was conducted over 48 hr. To control for maternal environmental tobacco smoke (ETS) exposure, we excluded those with umbilical cord plasma cotinine concentrations > 25 ng/mL. Mean cord plasma cotinine concentrations in both ethnic groups were <or= 0.5 ng/mL.
  
  
  RESULTS
  Prenatal PAH exposure was 10-fold higher in Krakow than in NYC. Prenatal PAH exposure was associated with significantly reduced birth weight in both Krakow Caucasians (p < 0.01) and in NYC African Americans (p < 0.01), controlling for known and potential confounders, but not in NYC Dominicans. Within the lower exposure range common to the two cities (1.80-36.47 ng/m3), the effect per unit PAH exposure on birth weight was 6-fold greater for NYC African Americans than for Krakow Caucasians (p = 0.01).
  
  
  CONCLUSIONS
  These results confirm the adverse reproductive effect of relatively low PAH concentrations in two populations and suggest increased susceptibility of NYC African Americans. Fetal growth impairment has been linked to child developmental and health problems. Thus, substantial health benefits would result from global reduction of PAH emissions.
authors.affiliation: Columbia Center for Children's Environmental Health, Mailman School of Public Health, Columbia University, New York, New York 10032, USA.
authors.forename: Hyunok
authors.initials: H
authors.lastname: Choi
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Jedrychowski
authors.forename: John
authors.initials: J
authors.lastname: Spengler
authors.forename: David E
authors.initials: DE
authors.lastname: Camann
authors.forename: Robin M
authors.initials: RM
authors.lastname: Whyatt
authors.forename: Virginia
authors.initials: V
authors.lastname: Rauh
authors.forename: Wei-Yann
authors.initials: WY
authors.lastname: Tsai
authors.forename: Frederica P
authors.initials: FP
authors.lastname: Perera
mesh_terms: D000293:Adolescent; D000328:Adult; D000393:Air Pollutants / Q000032:analysis / Q000633:toxicity*; D001724:Birth Weight / Q000187:drug effects; D001827:Body Height / Q000187:drug effects; D005260:Female; D047109:Fetal Development / Q000187:drug effects*; D006257:Head / Q000033:anatomy & histology; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D018811:Maternal Exposure / Q000009:adverse effects*; D009519:New York City; D011044:Poland; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000633:toxicity*; D011247:Pregnancy
chemical_list: D000393:Air Pollutants; D011084:Polycyclic Aromatic Hydrocarbons