“…Studies suggest that foreign-born mothers have lower household incomes and levels of education compared to U.S.-born mothers (e.g., Gould et al, 2003). Conversely, foreign-born mothers have lower rates of exposures to unfavorable behavioral characteristics such as alcohol drinking, cigarette smoking, environmental tobacco smoke, and maternal illnesses compared to their U.S.-born counterparts (Ventura and Taffel, 1985;Cabral et al, 1990;Singh and Yu, 1996;Cocroft et al, 2002;Cubbin et al, 2002;Borrell et al, 2006;Perreira and Cortes, 2006;Barcenas et al, 2007;Ethen et al, 2008). Generally, most of these studies examined specific risk factors without a focus on the periconceptional period.…”