The accumulation of vitrified oocytes is a strategy to increase the number of euploid available blastocysts for transfer after preimplantation genetic testing

Purpose In a preimplantation genetic diagnosis for aneuploidy (PGD-A) program, the more embryos available for biopsy, consequently increases the chances of obtaining euploid embryos to transfer. The aim was to increase the number of viable euploid blastocysts in patients undergoing PGD-A using fresh...

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Bibliographic Details
Published in:Journal of assisted reproduction and genetics 2017-04, Vol.34 (4), p.479-486
Main Authors: Chamayou, Sandrine, Sicali, Maria, Alecci, Carmelita, Ragolia, Carmen, Liprino, Annalisa, Nibali, Daniela, Storaci, Giorgia, Cardea, Antonietta, Guglielmino, Antonino
Format: Article
Language:English
Subjects:
Adult
Aneuploidy
Assisted Reproduction Technologies
Biopsy
Blastocyst - metabolism
Chromosomes
Cryopreservation
Embryo Transfer - methods
Embryos
Female
Fertilization in Vitro
Genetic testing
Gynecology
Human Genetics
Humans
In vitro fertilization
Medicine
Medicine & Public Health
Mitochondrial DNA
Oocytes - growth & development
Oocytes - metabolism
Ovarian Reserve - genetics
Ovaries
Pregnancy
Preimplantation Diagnosis
Reproductive Medicine
Vitrification
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Summary:Purpose In a preimplantation genetic diagnosis for aneuploidy (PGD-A) program, the more embryos available for biopsy, consequently increases the chances of obtaining euploid embryos to transfer. The aim was to increase the number of viable euploid blastocysts in patients undergoing PGD-A using fresh oocytes together with previously accumulated vitrified oocytes. Methods Sixty-nine patients with normal ovarian reserve underwent PGD-A for repeated implantation failure or recurrent pregnancy loss indication. After several cycles of ovarian stimulation, 591 accumulated vitrified oocytes and 463 fresh oocytes were micro-injected with the same partner’s semen sample. PGD-A was completed on 134 blastocysts from vitrified/warmed oocytes and 130 blastocysts from fresh oocytes. Results A mean of 9.6% euploid blastocyst per micro-injected vitrified/warmed oocytes and 11.4% euploid blastocyst per micro-injected fresh oocyte were obtained ( p  > 0.05). The euploidy and aneuploidy rates were comparable in blastocysts obtained from micro-injected vitrified/warmed oocytes and fresh oocytes (42.5 versus 40.8% and 57.5 versus 59.2%, p  > 0.05). Implantation rates of euploid blastocysts were comparable between the two sources of oocytes (56.0% from vitrified/warmed oocytes versus 60.9% from fresh oocytes, p  > 0.05). Conclusions Oocyte vitrification and warming do not generate aneuploidy in blastocysts. The number of viable euploid embryos for transfer can be increased by using accumulated vitrified oocytes together with fresh oocytes in ICSI. Trial registration NCT02820415 ClinicalTrials.gov
ISSN:1058-0468
1573-7330
DOI:10.1007/s10815-016-0868-0