In relation to the decidua capsularis, what is the smooth chorion most closely associated with?

The smooth chorion is closely associated with the decidua capsularis because during the early stages of pregnancy, the placenta develops from the chorion, which consists of two parts: the villous chorion and the smooth chorion. The smooth chorion, which is devoid of chorionic villi, forms over the surface that is in contact with the decidua capsularis, the portion of the decidua that is located adjacent to the growing fetus and the amniotic sac.

As pregnancy progresses, the decidua capsularis eventually becomes compressed as the gestational sac expands, but it serves a critical role during early pregnancy. The relationship of the smooth chorion and decidua capsularis reflects the dynamic changes occurring as the placenta develops and as the embryo grows, emphasizing the mutual adaptation between fetal tissues and the maternal tissue.

This association highlights the importance of the decidua in providing a nurturing environment while also enabling the placenta to function effectively during gestation. Understanding this relationship helps clarify the role of different placental components and their interactions throughout the pregnancy.