Prematurity, postdates, and growth retardation: The influence of use of ultrasonography on reported gestational age

摘要: The preterm and postterm delivery rates the percentage of infants with intrauterine growth retardation are dependent on gestational age recorded at delivery. At our institution a sharp increase in rate coincident decrease were noted. Over 3-year period, while characteristics obstetric population changed only slightly, distribution shifted, mean about 1 week risk reported from 12% to 17%. About 15% this rise was explained by an interventions, another can be changes way physicians rounded off age. majority related involving ultrasonographic examinations. These included greater examined, trends toward earlier examinations, tendency for use ultrasonography rather than last menstrual period choosing final age, different standards, number structures measured, weight given various determination It is apparent that had profound effect institution.