funiculus any of several body structure resembling a cord
fetal membrane any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus
conceptus,
fertilized egg,
embryo an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
fetus,
foetus an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal
