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Does the egg, the zygote, embryo or fetus implant?

By Sara Salgado.
Last Update: 08/09/2018

The embryo is the one that penetrates the endometrium during implantation. Once fertilization occurs, we are no longer talking about egg, but zygote. Once the zygote is formed, it is divided to give rise to what we call embryo. From the 8th week of pregnancy, the embryo is called fetus.

For more information about the differences, refer to the following article: What is the difference between zygote, embryo and fetus?

Suggested for you: What are the Different Stages of Embryo Implantation?.

 Sara Salgado
Sara Salgado
BSc, MSc
Embryologist
Degree in Biochemistry and Molecular Biology from the University of the Basque Country (UPV/EHU). Master's Degree in Human Assisted Reproduction from the Complutense University of Madrid (UCM). Certificate of University Expert in Genetic Diagnosis Techniques from the University of Valencia (UV).
Embryologist. Degree in Biochemistry and Molecular Biology from the University of the Basque Country (UPV/EHU). Master's Degree in Human Assisted Reproduction from the Complutense University of Madrid (UCM). Certificate of University Expert in Genetic Diagnosis Techniques from the University of Valencia (UV).
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