An egg is not an embryo. It’s an egg cell that can receive sperm to become fertilized. Then it starts to grow and is called an embryo. In species where the embryo develops inside its mother, it is called a fetus in later stages.
The reason why I added the ‘not in chicken’ disclaimer is because bees, for instance, do develop without fertilization. But I don’t know enough about that to elaborate further.
An embryo (/ˈɛmbrioʊ/ EM-bree-oh) is the initial stage of development for a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell.
Elaborate?
An egg is not an embryo. It’s an egg cell that can receive sperm to become fertilized. Then it starts to grow and is called an embryo. In species where the embryo develops inside its mother, it is called a fetus in later stages.
Further reading: https://en.wikipedia.org/wiki/Animal_embryonic_development#Fertilization_and_the_zygote
The reason why I added the ‘not in chicken’ disclaimer is because bees, for instance, do develop without fertilization. But I don’t know enough about that to elaborate further.
Embryo indicates fertilization. Other wise it’s just an egg maybe?
https://en.wikipedia.org/wiki/Embryo