title: X-ray examinations during pregnancy: National Natality Surveys, 1963 and 1980.
abstract: Based on 1963 and 1980 National Natality Surveys, the rate of medical x-ray examinations during pregnancy per 100 mothers fell 34.2 percent. A decrease in chest x-ray examinations accounted for almost all of the decline in total x-ray examinations. The reductions were greater for older mothers and those who were not White. While the number of births fell from 4,071,000 in 1963 to 3,612,000 in 1980, the number of pelvimetry examinations actually increased by 45,000.
authors.affiliation: Center for Devices and Radiological Health (CDRH) of the Food and Drug Administration, Rockville, MD 20852.
authors.forename: R G
authors.initials: RG
authors.lastname: Kaczmarek
authors.forename: R M
authors.initials: RM
authors.lastname: Moore
authors.forename: K G
authors.initials: KG
authors.lastname: Keppel
authors.forename: P J
authors.initials: PJ
authors.lastname: Placek
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D011247:Pregnancy; D011859:Radiography / Q000706:statistics & numerical data*; D014481:United States