Final answer:
The chronological order of embryonic development starts with the germinal stage at fertilization, followed by the embryonic stage that ends at the eighth week, and then the fetal stage, proceeding till birth.
Step-by-step explanation:
Chronological Order of Embryonic and Fetal Development
The series of embryonic and fetal developments listed in chronological order are as follows: germinal stage, embryonic stage, and fetal stage. The germinal stage begins at fertilization and includes early cell divisions, going through the stages of the zygote, morula, and blastocyst, and ends with the implantation of the blastocyst in the uterus. During the embryonic stage, significant growth and development take place, including gastrulation, neurulation, and organogenesis which continue until the eighth week. This period involves the development of the three germ layers and extraembryonic tissues like the yolk sac, amnion, and placenta. From the ninth week until birth, the fetus undergoes maturation and growth, completing its development.
Key developments during the embryonic stage include the formation of blood vessels and the placenta, the beginning of the heartbeat, and the initiation of organ function. These lead to the establishment of the basic structures which continue to mature through the fetal stage.