- Embryo | Description, Characteristics, Development | Britannica
embryo, the early developmental stage of an animal while it is in the egg or within the uterus of the mother In humans the term is applied to the unborn child until the end of the seventh week following conception; from the eighth week the unborn child is called a fetus A brief treatment of embryonic development follows
- The differences between zygote, embryo and foetus during pregnancy
Embryonic development consists of different stages From fertilisation to birth we distinguish between zygote, embryo, foetus and baby Specifically, the term embryo is used until the 8th week of gestation, after which it is called foetus until the baby is born
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