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Reference: Radiology Secret Plus, 2011
Chapter 70 - Obstetric Ultrasound: first trimester imaging
● List 7 causes of vaginal bleeding in the first trimester.
Implantation bleed
Subchorionic hemorrhage
Embryonic pregnancy/blighted ovum
Embryonic demise
Spontaneous abortion
Ectopic pregnancy
Molar pregnancy
● Name 3 possible causes of a positive serum β-HCG level and an empty uterus on US.
Early normal intrauterine pregnancy (<5weeks)
Complete spontaneous abortion
Ectopic pregnancy
● When should a gestational sac be seen with transabdominal and transvaginal US?
By 5 weeks (serum β-HCG level of 1000 to 2000mIU/mL), a gestational sac of approximately 5mm should be seen transabdominally or transvaginally.
May Allah ease.
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