Embryology topics include: Animal cell, ovumand spermatozoon, ovum fertilization, notochord, embryo separation, fetal membranes and placenta development, embryo stages and its growth. Embryology is the study of the development of an embryo from fertilization to the fetal stage.    The four stages of embryonic development are: Stage 1: Fertilization Stage 2: Blastocyst development and implantation Stage 3: Embryo development Stage 4: Fetal development  In humans, the term "embryo" is used until the end of the seventh week after conception. After that, the unborn child is called a... Show more

Embryology topics include: Animal cell, ovumand spermatozoon, ovum fertilization, notochord, embryo separation, fetal membranes and placenta development, embryo stages and its growth.

Embryology is the study of the development of an embryo from fertilization to the fetal stage. 
 

The four stages of embryonic development are:
Stage 1: Fertilization
Stage 2: Blastocyst development and implantation
Stage 3: Embryo development
Stage 4: Fetal development 

In humans, the term "embryo" is used until the end of the seventh week after conception. After that, the unborn child is called a fetus. 
Comparative embryology is a branch of embryology that compares embryos of different species to show how animals are related. 
Gastrulation is a complex process that involves the embryo reorganizing itself to create the three embryonic germ layers: endoderm, mesoderm, and ectoderm.

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