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How many embryos are implanted?

By Sara Salgado B.Sc., M.Sc. (embryologist).
Last Update: 02/21/2022

The number of embryos that manage to enter the endometrium will depend mainly on how many embryos have been transferred, their quality and the receptivity of the endometrium.

Thus, the fact that two embryos are transferred does not necessarily mean that a twin pregnancy will occur. It is possible that both will implant, but it is also possible that only one or even none of them will implant.

If the quality of the embryos is good (type A or B embryos), the probability of implantation will be higher. In these cases it is recommended to transfer only one embryo to avoid multiple pregnancies.

Read the full article on: Embryo transfer: when and how is it done? ( 79).
 Sara Salgado
Sara Salgado
B.Sc., M.Sc.
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).