👉 The term "ectocyst" is commonly used in medical terminology to describe an abnormal or non-functional part of a fertilized egg. It refers to a sac or chamber that contains embryonic cells and may not be fully developed yet, but it's still considered essential for the development of the embryo. In other words, ectocysts are the developmental stages that occur after fertilization, where the egg has completed its journey through the developing embryo before implanting itself into the uterine wall.
