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Original ArticleOpen Access
Sonographic Findings in Clinically diagnosed Threatened Abortion
Uerpairojkit B 
,
Charoenvidhya D ,
Tannirandorn Y ,
Wacharaprechanont T ,
Manotaya S ,
Samritpradit P ,
Somprasit C
,
Charoenvidhya D ,
Tannirandorn Y ,
Wacharaprechanont T ,
Manotaya S ,
Samritpradit P ,
Somprasit C Objective : To determine the sonographic appearances in pregnant women who presented
with vaginal bleeding in the first 20 weeks of gestation.
Method : Pregnant women of under 20 gestational weeks diagnosed clinically as threatened
abortion were recruited for ultrasound scan at the Division of Maternal-Fetal Medicine, Department
of Obstetrics and Gynecology, Faculty of Medicine, Chulalongkorn University. The sonographic
findings were reported as viable pregnancy, anembryonic pregnancy, embryonic death, incomplete
abortion, complete abortion, ectopic pregnancy, molar pregnancy and inconclusive findings. Patients
with inconclusive findings were followed weekly until final diagnoses were established. All patients
were followed-up to 20 weeks or until the final outcomes were revealed.
Results : Two hundred and sixty eight pregnant patients were enrolled. Ultrasound scans
demonstrated 100 viable fetuses (37.3%), 73 embryonic deaths (27.3%), 46 anembryonic preg-
nancies (17.2%), 6 molar pregnancies (2.2%), 3 ectopic pregnancies (1.1%), 14 complete abortions
(5.2%) and 26 inconclusive findings (9.7%). Follow-up scan on patients with inconclusive find-
ings revealed 9 anembryonic pregnancies (3.3% ), 9 incomplete abortions (3.3% ), 1 embryonic
death (0.4%) and 1 viable pregnancy (0.4%). Six patients (2.3%) were lost to follow-up. The viable
pregnancy rate according to maternal age was highest at the maternal age of 25 to 29 years old
(49%), whereas, it was lowest at the maternal age of 40 to 44 years old (0%). The viable preg-
nancy rate according to gestational age was highest at 6 to 8 weeks (61.2%), whereas, it was
lowest at 18 to 20 weeks (20%).
Conclusion : Sonographic findings in patients with clinically diagnosed threatened abor-
tion demonstrated viable pregnancies in around one-third of the cases. Use of ultrasound in clini-
cally diagnosed threatened abortion may assist clinicians in establishing a definite diagnosis so
that appropriate care could be offered to the patients.
Key word : Threatened Abortion, Ultrasound.
with vaginal bleeding in the first 20 weeks of gestation.
Method : Pregnant women of under 20 gestational weeks diagnosed clinically as threatened
abortion were recruited for ultrasound scan at the Division of Maternal-Fetal Medicine, Department
of Obstetrics and Gynecology, Faculty of Medicine, Chulalongkorn University. The sonographic
findings were reported as viable pregnancy, anembryonic pregnancy, embryonic death, incomplete
abortion, complete abortion, ectopic pregnancy, molar pregnancy and inconclusive findings. Patients
with inconclusive findings were followed weekly until final diagnoses were established. All patients
were followed-up to 20 weeks or until the final outcomes were revealed.
Results : Two hundred and sixty eight pregnant patients were enrolled. Ultrasound scans
demonstrated 100 viable fetuses (37.3%), 73 embryonic deaths (27.3%), 46 anembryonic preg-
nancies (17.2%), 6 molar pregnancies (2.2%), 3 ectopic pregnancies (1.1%), 14 complete abortions
(5.2%) and 26 inconclusive findings (9.7%). Follow-up scan on patients with inconclusive find-
ings revealed 9 anembryonic pregnancies (3.3% ), 9 incomplete abortions (3.3% ), 1 embryonic
death (0.4%) and 1 viable pregnancy (0.4%). Six patients (2.3%) were lost to follow-up. The viable
pregnancy rate according to maternal age was highest at the maternal age of 25 to 29 years old
(49%), whereas, it was lowest at the maternal age of 40 to 44 years old (0%). The viable preg-
nancy rate according to gestational age was highest at 6 to 8 weeks (61.2%), whereas, it was
lowest at 18 to 20 weeks (20%).
Conclusion : Sonographic findings in patients with clinically diagnosed threatened abor-
tion demonstrated viable pregnancies in around one-third of the cases. Use of ultrasound in clini-
cally diagnosed threatened abortion may assist clinicians in establishing a definite diagnosis so
that appropriate care could be offered to the patients.
Key word : Threatened Abortion, Ultrasound.
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