What is the name of a diploid cell formed as a result of the fusion of germ cells?

This cell is called a zygote. It is formed by the fusion of one egg and one sperm. In humans, these sex cells carry half the chromosome set. After merging, after a while, the zygote begins to actively divide. This is how the embryo appears. This takes about two months. The embryo after the first trimester is already called a fetus, since it begins to look like a child. The embryo, on the other hand, has many features that were in our ancestors and eventually disappeared in the process of evolution.