An unborn child is called a fetus from the moment it is recognized as a developing human being. This is the age of 2 months of pregnancy, or 8 obstetric weeks. The period of intrauterine development in this case is called "fetal". Up to this point, the fertilized egg is called the "embryo" or "embryo", and the period of its development is called the embryonic. Therefore, during the period from the 5th to the 8th obstetric week, we are talking about the child as an embryo.