One-cell biopsy significantly improves the outcome of preimplantation genetic diagnosis (PGD) treatment: retrospective analysis of 569 PGD cycles at the Stockholm PGD centre

What are the significant factors that influence the outcome of a PGD treatment? The age of the woman and the number of biopsied cells per embryo are of significant importance for a successful PGD treatment. Younger women are more likely to succeed with an IVF treatment. Cohort study, retrospective analysis of 569 PGD cycles, 19962009. 256 couplesand 569 PGD treatments at oStockholm PGD centre'. At this centre after 2003, a 1-cell policy was applied, when possible, with respect to the reliability of the diagnostic test and since 2009, 1-cell biopsy policy was also applied for monogenic disorders. The women under 36 years of age were three times more likely to get pregnant after PGD treatment, P 0.003 and odds ratio 3.1 [95 confidence interval (CI) 1.56.5]. The 1-cell biopsy cycles were twice as likely to result in a pregnancy in comparison with cycles were 2 cells were removed from the embryo, P 0.0013 and odds ratio 2.55 (95 CI 1.444.52). No other factors were found to be significant for the outcome. Retrospective analysis with 1- and 2-cell biopsies at different times. The results will have an impact on the implementation of PGD in general, thereby making it possible to significantly improve the treatment outcome. The work was supported by grants from the Swedish Medical Research Council and the Stockholm County Council. No competing interest.