How does the Decidua Capsularis Change During Pregnancy?
As the pregnancy progresses, the decidua capsularis undergoes significant changes. During the first trimester, it is well-defined and covers the embryo completely. However, as the embryo grows and the gestational sac expands, the decidua capsularis stretches and becomes thinner. By the end of the first trimester, it merges with the decidua parietalis, the lining of the rest of the uterine cavity, and the two become indistinguishable.
