We developed several FISH approaches to enable preimplantation genetic diagnosis of cancer predisposition syndromes. An overview of the applications and the results of those PGDs will be provided. In addition we developed several novel tools to genome wide screen for CNVs and SNPs in single cells. Those technologies are now being applied for polar body, blastomere and blastocyst screening for c...

Since its first clinical application in early 90s, preimplantation genetic diagnosis (PGD) has became a powerful diagnostic procedure in clinical practice for avoiding the birth of an affected child as well as increasing the assisted reproductive technologies (ART) outcome . The technique involves the screening of preimplantation embryos for chromosomal abnormalities in certain indications such...

Isolated blastomeres obtained by embryo biopsy serve mainly for preimplantation genetic screening. Blastomeres are undifferentiated embryonic cells that include all the embryo genetic information. A lot of developing technologies may benefit by the efficient cryopreservation of blastomeres for future potential use, especially for stem cell culture and differentiation control. We are hereby repo...

Preimplantation genetic screening (PGS) is widely used to select in vitro-fertilized embryos free of chromosomal abnormalities and to improve the clinical outcome of in vitro fertilization (IVF). A disadvantage of PGS is that it requires biopsy of the preimplantation human embryo, which can limit the clinical applicability of PGS due to the invasiveness and complexity of the process. Here, we p...

OBJECTIVE To determine the extent of intra-age and intercycle variations in the frequency of first polar body aneuploidy in two consecutive cycles of oocyte retrieval undertaken by the same patient within 1 year. DESIGN Retrospective study. SETTING Fertility centers. PATIENT(S) Infertile couples undergoing IVF. INTERVENTION(S) Patients underwent two consecutive cycles of preimplantation...

BACKGROUND Since it was established in 1997, the ESHRE PGD Consortium has been collecting data from international preimplantation genetic diagnosis (PGD) centres. Ten papers have been published, including data from January 1997 to December 2007. METHODS The data collection originally used a hard-copy format, then an excel database and finally a FileMaker Pro database. The indications are divi...

Preimplantation diagnosis provides couples at high genetic risk the possibility of avoiding genetic disease without the need for prenatal diagnosis and selective abortion of the affected pregnancy. Following extensive background work on the reliability of genetic diagnosis in a single cell, we offered on a research basis preimplantation diagnosis to five couples at risk for offspring with the d...

OBJECTIVE To compare the prevalence of blastocyst development and euploidy in XX versus XY embryos. DESIGN Retrospective cohort study. SETTING Boston IVF, a large university-affiliated reproductive medicine practice. PATIENT(S) All patients who underwent their first preimplantation genetic screening cycle between January 1, 2006, and December 31, 2007. INTERVENTION(S) In vitro fertiliza...

Preimplantation genetic diagnosis (PGD) is commonly performed on biopsies from 6-8-cell-stage embryos or blastocyst trophectoderm obtained on day 3 or 5, respectively. Day 4 human embryos at the morula stage were successfully biopsied. Biopsy was performed on 709 morulae from 215 ICSI cycles with preimplantation genetic screening (PGS), and 3-7 cells were obtained from each embryo. The most com...

Objective Indications for preimplantation genetic diagnosis (PGD)/preimplantation genetic screening (PGS) cycles and clinical outcomes were evaluated at CHA Gangnam Medical Center. Methods This is retrospective cohort study. All patients (n=336) who went through in vitro fertilization (IVF)-PGD/PGS cycles (n=486) between January 2014 and December 2015 were included in Fertility Center of CHA ...