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Purpose: To determine if embryo banking with PGS is more optimal than proceeding with PGS regardless of embryo number. Methods: Patients were divided into 2 groups, group 1 were those that banked embryos and proceeded through another round of IVF prior to PGS, and group 2 underwent PGS regardless of embryo number. Group 2 was divided into group 2A (patients with >10 embryos) and group 2B (patients who had <10 embryos). Results: There was no difference in embryos biopsied, normal embryos, number transferred, and pregnancy rate between group 1 and 2. A significant number of patients did not have a transfer in group 2B (6/11) compared to group 1 (3/19) ( P = 0.0419). There was no significance between pregnancy rates per transfer between group 1 (6/16) and group 2B (2/5). Conclusion: Our data suggests that banking will increase the odds of going to transfer but there was no increase in pregnancy rates. [ABSTRACT FROM AUTHOR]

Objective: To report a clinical pregnancy after rebiopsy and vitrification of blastocysts following allele dropout (ADO) of biopsied day 3 embryos. Design: Case report. Setting: Private center. Patient(s): Thirty-year-old woman and her 33-year-old husband who carries the single-gene condition paraganglioma. Intervention(s): In vitro fertilization with day 3 embryo biopsy–ET–blastocyst biopsy and vitrification–subsequent frozen ET cycle. Main Outcome Measure(s): Results from preimplantation genetic diagnosis and pregnancy results after fresh and frozen ETs. Result(s): Nineteen oocytes were retrieved of which 13 were mature and 12 fertilized. Eleven embryos were biopsied on day 3: two were normal, five were affected, and four exhibited ADO. The two normal blastocysts were transferred, and three of the ADO blastocysts were biopsied and sent for reanalysis. The biopsied blastocysts were vitrified. No pregnancy resulted from the fresh ET. One of the biopsied blastocysts was normal, one received no result, and one exhibited ADO. A singleton clinical pregnancy resulted from a subsequent frozen ET of the thawed biopsied normal blastocyst. Conclusion(s): Rebiopsy and vitrification of blastocysts could be used in cases of ADO or lack of results after day 3 embryo biopsy. [Copyright &y& Elsevier]