title: Measurement of substance use during pregnancy: methodologic issues.
mesh_terms: D000014:Abnormalities, Drug-Induced / Q000209:etiology; D000293:Adolescent; D000328:Adult; D002188:Cannabis; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D019966:Substance-Related Disorders / Q000150:complications / Q000175:diagnosis*; D013997:Time Factors