"embryonic membrane" is correct and can be used in written English.
This term is typically used in medical contexts to refer to the thin membrane that covers the embryo during gestation. For example, you could say: "The embryonic membrane protects the developing fetus from any potential harm."
It enlarges greatly during the course of development, eventually expanding between the amnion and chorion and also between the chorion and the yolk sac, to become the third embryonic membrane.
The technique of retrieving a sample of villi from the chorion (outer embryonic membrane) within the uterus is similar to amniocentesis but can be carried out much earlier in pregnancy, between the 8th and 12th week of gestation.
Absence or abnormality of whole limbs is less common and includes, besides clubfoot, the so-called congenital amputations once thought to be caused by the strangulation of a limb by a fold of embryonic membrane (amnion).
In resorption two, the embryo itself could not be detected, only a fluid filled cavity with an embryonic membrane.
However, substrate (CTF) levels per µg of protein were also higher in the embryonic membrane preparation compared to adult.
Embryonic lethality during this period of development is commonly caused by potential failures in gastrulation, defects in extra embryonic membrane functions such as vasculogenesis or hematopoiesis and/or cardiovascular failure [45].
The structure and composition of the eggshell and embryonic membranes of Alligator mississippiensis.
Vertebrates have three embryonic membranes: the amnion, the chorion, and the allantois.
Oxygen is obtained in the former from the placenta and in the latter from embryonic membranes close to the porous eggshell.
Apoikogenic embryos primarily use yolk and receive only some nourishment from the mother, possibly by diffusion across embryonic membranes.
In addition to the yolk sac, extra-embryonic parts are also encountered in the form of embryonic membranes, which are found in higher vertebrates and in insects.
