{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T22:41:04Z","timestamp":1783982464619,"version":"3.55.0"},"reference-count":21,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2015,10,27]],"date-time":"2015-10-27T00:00:00Z","timestamp":1445904000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Ultrasound Medicine"],"published-print":{"date-parts":[[2015,12]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>The purpose of this study was to estimate the rate of incomplete fetal anatomic surveys during a second\u2010trimester scan due to an unfavorable fetal position in a nonobese population.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>All pregnant women who came to the Altamedica Fetal\u2010Maternal Medical Center, a specialized center for prenatal diagnosis, for a routine second\u2010trimester scan between January 2012 and April 2013 were retrospectively included in the analysis. Patients with a body mass index higher than 30.0 kg\/m<jats:sup>2<\/jats:sup> or anterior fibroids larger than 5 cm were not included in the study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of 4000 pregnant women admitted for a second\u2010trimester scan, 169 (4.2%) came back within 2 weeks to complete the examination because of an unfavorable fetal position. In particular, 104 (2.6%) needed visualization of only 1 view, and 65 (1.6%) needed more than 1 view. The most difficult organ to visualize was the corpus callosum, in 73 cases (1.8%); the face was not visualized in 69 cases (1.7%); the cerebellar vermis was not seen in 47 fetuses (1.1%); and the heart could not be completely examined in 40 fetuses (1.0%). Of the 4000 women, 169 (4.2%) had a nonexhaustive scan; 149 (3.7%) needed a second scan to complete the second\u2010trimester survey; 14 (0.35%) needed a third scan; and 2 (0.05%) remained with a not completely exhaustive scan.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>There is always a small percentage of incomplete fetal anatomic surveys during a second\u2010trimester scan, which cannot be modified by the sonographer's skill or by technical sonographic innovations.<\/jats:p><\/jats:sec>","DOI":"10.7863\/ultra.15.01029","type":"journal-article","created":{"date-parts":[[2015,11,25]],"date-time":"2015-11-25T21:57:14Z","timestamp":1448488634000},"page":"2187-2191","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["What Is the Rate of Incomplete Fetal Anatomic Surveys During a Second\u2010Trimester 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