What term covers the surface of the implanted conceptus?

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Multiple Choice

What term covers the surface of the implanted conceptus?

Explanation:
The surface of the implanted conceptus is covered by the decidua capsularis. This portion of the decidua forms a capsule over the developing sac as it implants into the endometrium. The decidua basalis lies beneath the conceptus and contributes to the maternal part of the placenta, while the decidua parietalis lines the rest of the uterine cavity. The term double decidual sign describes the two decidual layers seen around the sac on ultrasound, not the surface covering the conceptus.

The surface of the implanted conceptus is covered by the decidua capsularis. This portion of the decidua forms a capsule over the developing sac as it implants into the endometrium. The decidua basalis lies beneath the conceptus and contributes to the maternal part of the placenta, while the decidua parietalis lines the rest of the uterine cavity. The term double decidual sign describes the two decidual layers seen around the sac on ultrasound, not the surface covering the conceptus.

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