It is an additional technique to In Vitro Fertilization and consists of letting the embryos reach the fifth or sixth day of development (BLASTOCISTO) in the laboratory to have a better morphological selection of embryos.

It is indicated in patients who have undergone previous treatments of In Vitro Fertilization and pregnancy has not been achieved by women over 38 years of age, patients undergoing Preimplantation Genetic Diagnosis.

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