Candling is done to check on the contents of the egg. Candling eggs reveals blood spots and when done to fertilized eggs can verify the growth of the embryo.
fertilized egg,embryo, and fetus
when the ovary is fertilized the the fertilized egg will become a zygote
The fertilized egg becomes an embryo and later becomes a fetus.
Certain cells of a fertilized embryo.
Implantation
Embryo
A polar body is a remnant of the production of egg cells, and is potentially capable of being fertilized. While a fertilized polar body could begin growing, there's usually not enough stored nutrients in it to feed the developing embryo.
the zygote is dormant for sometime because it develops only after the endosperm develops. this is an adaptation to ensure nutrition to the growing embryo.
When they are fertilized. Gametes are the eggs or sperm
embryo
The yolk supplies all the nutrients for the growing embryo.