Self-Reports of Smoking in Pregnancy Unreliable Cigarette smoking during pregnancy is associated with a higher risk for low-birth weight delivery, stillbirth, and infant death, with nicotine exposure alone associated with increases in vasoconstriction and possibly fetal growth restriction. Their study focused on nicotine exposures during the last few days of pregnancy, measured through mass spectrometry analysis of urine cotinine levels. 2016-07-11 medpagetoday.com
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