Author:

Keywords:

Science & Technology, Life Sciences & Biomedicine, Endocrinology & Metabolism, Reproductive Biology, Vitrified/warmed embryo, Embryo morphology, Morphometrics, Frozen embryo transfer, Implantation rate, CLEAVAGE-STAGE EMBRYOS, DEVELOPMENTAL CONSEQUENCES, VITRIFICATION, CRYOPRESERVATION, BLASTOMERES, PREGNANCY, PARAMETERS, SELECTION, OUTCOMES, OOCYTES, Adult, Cohort Studies, Cryopreservation, Embryo Culture Techniques, Embryo Implantation, Female, Hot Temperature, Humans, Pregnancy, Retrospective Studies, Single Embryo Transfer, Vitrification, 06 Biological Sciences, 11 Medical and Health Sciences, Obstetrics & Reproductive Medicine, 31 Biological sciences, 32 Biomedical and clinical sciences, 42 Health sciences

Abstract:

Characteristics routinely used to evaluate embryo quality after thawing include number of blastomeres survived and presence of mitosis resumption after overnight culture. It is unknown to which extent symmetry and fragmentation affect implantation after warming and whether application of stricter criteria either before vitrification or after warming would improve implantation rate (IR) of vitrified/warmed embryos. This study aimed to find new parameters to improve selection criteria for vitrification and for transfer after warming.