Ultrasound in Early Pregnancy


Transvaginal ultrasound is —————– to transabdominal ultrasound for early pregnancy evaluation


A. Superior

B. Inferior

C. Equivalent

D. Transvaginal ultrasound is contraindicated in early pregnancy evaluation



All of the following are Indication of First Trimester Ultrasonography EXCEPT


A. Suspected ectopic pregnancy

B. Vaginal bleeding

C. Liquor volume

D. Suspected molar pregnancy



Double decidua sign of the gestational sac is due to the interface between –


A. Heuser’s membrane and chorion

B. Decidua and Chorion

C. Decidua and Amniotic sac

D. Yolk sac and Amniotic sac



Heuser’s membrane: all of the following are TRUE Except-


A. Also called as Exocoelomic membrane

B. Lines the outer surface of the cytotrophoblast

C. It surrounds the primary yolk sac

D. Short lived combination of hypoblast cells and extracellular matrix



Yolk sac should be seen when the gestational sac reaches


A. 10mm

B. 15mm

C. 20mm

D. 30mm



Fetal pole should be seen when the gestational sac reaches


A. 10mm

B. 15mm

C. 25mm

D. 35mm



All are correct about common findings in ‘Choriodecidual reaction’ EXCEPT –


A. Seen in very early pregnancy 

B. Thinning of the endometrium around the gestational sac

C. Seen as an echogenic rim on ultrasound

D. Thin decidual reaction of <2 mm suggests anembryonic pregnancy



Double decidual sac sign is a useful feature on early pregnancy ultrasound to confirm


A. Tubal pregnancy

B. Twin Pregnancy

C. Intrauterine Pregnancy

D. Fetal anomaly



Intradecidual sac sign is a useful feature in identifying


A. Tubal pregnancy

B. Twin Pregnancy

C. Intrauterine Pregnancy

D. Fetal anomaly



In shorts


Structure is seen by USG in early pregnancy – Level of β-hCG


Structure is seen in PregnancyUSGLevel of β-hCG
Gestational SacTVSβ-hCG level is 1,000–1,200 mIU/mL
Gestational SacTAS β-hCG 6,000 mIU/mL
Yolk sacβ-hCG 7,000 mIU/mL
Embryo
β-hCG 11,000 mIU/mL.
Level of β-hCG


Double decidual sac sign also known as –


  • Double decidual sac sign
  • Double decidual sign
  • Double sac sign

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