extraembryonic coelom

It briefly has a connection with the extraembryonic coelom.

Soon pockets form in the reticulum, which ultimately coalesce to form the chorionic cavity or extraembryonic coelom.

As development progresses, small lacunae begin to form within the extraembryonic mesoderm which become larger and form the extraembryonic coelom.

Extra-amniotic pregnancy is a rare condition that can result from a rupture of the amnion, leading to development of the fetus within the extraembryonic coelom.

Mammalian embryos develop two coelomic cavities: the intraembryonic coelom and the extraembryonic coelom (or chorionic cavity).

The extraembryonic coelom (or Chorionic cavity) is a portion of the conceptus consisting of a cavity between Heuser's membrane and the Trophoblast.

The intraembryonic coelom is lined by somatic and splanchnic lateral plate mesoderm, while the extraembryonic coelom is lined by extraembryonic mesoderm.