Which term is described as the decidua composed of the capsularis and parietalis, presenting a thick hyperechoic rim around a sonolucency and indicative of a viable intrauterine pregnancy?

Which term is described as the decidua composed of the capsularis and parietalis, presenting a thick hyperechoic rim around a sonolucency and indicative of a viable intrauterine pregnancy?

• A. Decidua Basalis
• B. Decidua Capsularis
• C. Decidua Parietalis
• D. Double Decidua Sign

Answer: (D)

The double decidua sign is seen in early intrauterine pregnancy when the decidua forms two layers around the gestational sac: the capsularis over the sac and the parietalis along the rest of the uterine cavity. This creates two concentric echogenic rims (a thick hyperechoic ring) surrounding a sonolucent gestational sac. This bilayer appearance indicates a viable intrauterine pregnancy because the sac is enclosed by decidua on both sides, confirming its location within the uterus. The other terms refer to individual or different decidual regions (such as the site of implantation) and do not produce the characteristic two-ring pattern around the sac.

The double decidua sign is seen in early intrauterine pregnancy when the decidua forms two layers around the gestational sac: the capsularis over the sac and the parietalis along the rest of the uterine cavity. This creates two concentric echogenic rims (a thick hyperechoic ring) surrounding a sonolucent gestational sac. This bilayer appearance indicates a viable intrauterine pregnancy because the sac is enclosed by decidua on both sides, confirming its location within the uterus. The other terms refer to individual or different decidual regions (such as the site of implantation) and do not produce the characteristic two-ring pattern around the sac.