Assertion: teratogen's effect | /r/HasProperty | fletcher
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Source sentences:
text: In summary, epidemiologic studies can be used to better understand effects of certain exposures during pregnancy; however, many factors need to be considered before assuming that the effect observed in a study is valid and meaningful for an individual woman.(Mitchell, 2003; Fletcher and Fletcher, 2005; Lagoy et al., 2005; Carey et al., 2009) (Rothman, 2002; Rasmussen et al., 2003; Mitchell, 2005; Jenkins et al., 2007)