What is the last stage of a human fertilized egg?

The last stage of a human fertilized egg is the fetal stage. This stage occurs after the embryonic stage, which encompasses the early development phases. Once the embryo has developed sufficiently, it enters the fetal stage around the end of the eighth week of gestation and continues until birth.

During the fetal stage, significant growth and maturation of the body systems take place. The structures established during the embryonic phase undergo further development and refinement to prepare for life outside the womb. This includes developments in the major organs, limbs, and even sensory systems. It is during this phase that the size and weight of the developing baby increase significantly, and the intricacies of the body's systems are finalized.

The zygote stage refers to the very early phase post-fertilization when the sperm and egg unite and form a single cell. The embryonic stage follows, focusing heavily on cell division and the early formation of tissues. The neonatal stage occurs after birth, dealing with the growth and development of a human newborn. Hence, the fetal stage is the correct answer, marking the most advanced development stage before birth.