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
fertilized by its own pollen
the most primitive mammals comprising the only extant members of the subclass Prototheria
capable of producing eggs and bearing offspring
animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds
one of the two male reproductive glands that produce spermatozoa and secrete androgens
