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  • Title: A healthy live birth after successful preimplantation genetic diagnosis for carriers of complex chromosome rearrangements.
    Author: Lim CK, Cho JW, Kim JY, Kang IS, Shim SH, Jun JH.
    Journal: Fertil Steril; 2008 Nov; 90(5):1680-4. PubMed ID: 18076880.
    Abstract:
    OBJECTIVE: To report a live birth after successful preimplantation genetic diagnosis (PGD) for carriers of complex chromosomal rearrangements (CCRs) with translocation and deletion. DESIGN: Fluorescent in situ hybridization (FISH) was applied to PGD for CCR carriers. SETTING: University-based centers for reproductive medicine. PATIENT(S): Three CCR carriers, patient A with 46,XX,t(6;10;8)(q25.1;q21.1;q21.1), patient B with 46,X,del(X)(p22.3),t(2;18)(q14.1;q21)[48]/45,X, t(2;18)(q14.1;q21)[12], and patient C with 46,XY,t(5;13;8)(q21.2;q14.3;q24.3). INTERVENTION(S): Balanced or normal embryos were diagnosed by PGD and transferred. MAIN OUTCOME MEASURE(S): Diagnosis rate of FISH, pregnancy outcome, and karyotype of amniocentesis. RESULT(S): Blastomeres were biopsied from 56 embryos in four PGD cycles, and 54 embryos (96.4%) were successfully diagnosed by FISH. Among them, four embryos were diagnosed as transferable in two cycles of patient B and one cycle of patient C. After three cycles of embryo transfer, a pregnancy was achieved in the second PGD cycle of patient B, and the karyotype of amniocentesis was 46,XY,t(2;18)(q14.1;q21). A healthy baby was delivered at 40 weeks of gestation by cesarean section. CONCLUSION(S): This is the first report for a live birth after PGD in the CCR carriers associated with translocation and deletion, 46,X,del(X)(p22.3),t(2;18)(q14.1;q21)[48]/45,X,t(2;18)(q14.1;q21)[12]. Preimplantation genetic diagnosis for CCRs needs more consideration and advanced techniques for full karyotyping.
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