title: Ultrasonographic characteristics in patients clinically diagnosed with threatened abortion.
abstract: OBJECTIVE
  To determine ultrasonographic appearances in pregnant women clinically diagnosed with threatened abortion.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Seven hundred and seventy six pregnant women clinically diagnosed with threatened abortion and receiving ultrasonographic examination were enrolled Data on ultrasonographic characteristics were obtained from records at the Maternal-fetal Medicine unit. Pregnancy outcomes were reviewed from medical records.
  
  
  RESULTS
  The ultrasonographic findings demonstrated 328 (42.3%) viable pregnancy, 178 (22.9%) embryonic death, 176 (22.7%) anembryonic pregnancy, 25 (3.2%) incomplete abortion, 24 (3.1%) complete abortion, seven (0.9%) molar pregnancy, four (0.5%) ectopic pregnancy, and 34 (4.4%) inconclusive finding. Two hundred and sixty viable pregnancies were available for follow-up and revealed that 229 (88.1%) eventually delivered while 31 (11.9%) ended up with abortion. The two groups were not significantly different regarding age, parity, history of abortion, and gestational age at diagnosis.
  
  
  CONCLUSIONS
  Ultrasonographic findings in patients clinically diagnosed with threatened abortion demonstrated viable pregnancy in nearly half of the cases. Transvaginal ultrasonography is useful in establishing definite diagnosis and appropriate treatment among these patients.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand. sidbr@mahidol.ac.th
authors.forename: Dittakarn
authors.initials: D
authors.lastname: Boriboonhirunsarn
authors.forename: Suwannee
authors.initials: S
authors.lastname: Buranawattanachoke
mesh_terms: D000033:Abortion, Threatened / Q000000981:diagnostic imaging*; D000293:Adolescent; D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D005328:Fetal Viability; D006801:Humans; D008429:Maternal Welfare; D011247:Pregnancy; D011248:Pregnancy Complications; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D012307:Risk Factors; D014463:Ultrasonography