What is the sequence of human embryological and fetal development?

Human embryological and fetal development begins with fertilization, forming a zygote that undergoes cleavage to become a blastocyst. This blastocyst implants into the uterine wall, leading to the embryonic stage, which includes the formation of the three germ layers (ectoderm, mesoderm, and endoderm) and the development of essential organs and structures. By the end of the eighth week, the embryo is termed a fetus, and further growth and maturation of organs occur until birth, which typically takes place around 40 weeks gestation.