Embryo and fetus are two terms used to describe the stages of prenatal development. Here are the differences between them:
- Embryo: The embryo is the developing organism from the point of fertilization until about the end of the eighth week of pregnancy. During this time, the embryo undergoes rapid cell division and differentiation to form the three germ layers (ectoderm, mesoderm, and endoderm) that give rise to all the organs and tissues of the body.
- Fetus: The fetus is the developing organism from the ninth week of pregnancy until birth. During this time, the fetus undergoes continued growth and development of its organs and tissues, as well as significant physical and behavioral changes. The fetus develops a recognizable form and features, such as fingers and toes, facial features, and distinct gender characteristics.
In summary, the main difference between embryo and fetus is the stage of development. The embryo is the developing organism from fertilization until the end of the eighth week, while the fetus is the developing organism from the ninth week of pregnancy until birth.
