Which ultrasound sign is described as a thick hyperechoic rim surrounding a sonolucency and indicates an intrauterine pregnancy?

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Multiple Choice

Which ultrasound sign is described as a thick hyperechoic rim surrounding a sonolucency and indicates an intrauterine pregnancy?

Explanation:
Two decidual layers encircle the gestational sac in early pregnancy, producing two echogenic rings around a sonolucent sac. This two-ring appearance, the double decidua sign, indicates the pregnancy is intrauterine because the sac is wrapped by maternal decidua within the uterus. It helps separate a true intrauterine pregnancy from ectopic scenarios, where a pseudosac may lack the characteristic double decidua pattern. In short, the thick bright rim around the sac reflects the two decidual layers lining the uterus around an intrauterine embryo.

Two decidual layers encircle the gestational sac in early pregnancy, producing two echogenic rings around a sonolucent sac. This two-ring appearance, the double decidua sign, indicates the pregnancy is intrauterine because the sac is wrapped by maternal decidua within the uterus. It helps separate a true intrauterine pregnancy from ectopic scenarios, where a pseudosac may lack the characteristic double decidua pattern. In short, the thick bright rim around the sac reflects the two decidual layers lining the uterus around an intrauterine embryo.

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