Review of 10 years of preimplantation genetic diagnosis in South Africa: implications for a low-to-middle-income country

Abstract

Purpose: To evaluate the preimplantation genetic diagnosis (PGD) service, for the period of January 2006 to December 2016, through a South African academic and diagnostic Human Genetics Unit, and to assess the outcomes and cost of PGD. Methods: A retrospective review of PGD files available at the Human Genetics Unit was performed. Data was collected from genetic counseling, fertility, and PGD-specific records. Results: Amongst the 22 couples who had PGD, 42 in vitro fertilisation cycles were completed with 228 embryos biopsied and included in the analysis. Most (59%) of the conditions for which PGD was requested were autosomal recessive. Of the biopsied embryos, 71/228 (31.1%) were suitable for transfer and 41/71 (57.7%) were transferred. Of these, 14/41 (34.0%) successfully implanted and 11/14 (78.6%) resulted in a liveborn infant. The clinical pregnancy rate per embryo transfer was 29.3%. Overall, 10/22 (45.5%) couples had a successful cycle resulting in a liveborn infant. On average, one cycle of PGD costs USD 9525. Conclusions: This is the first study to assess the success rates and the cost of PGD in South Africa and provides evidence for the feasibility in a low-to-middle-income country. The success rates in this sample are comparable to those achieved globally. South Africa has the infrastructure and expertise to provide PGD; the limiting factor is the lack of funding initiatives for PGD. Although the sample size was small, the findings from this study will enable genetic counselors to offer couples in South Africa evidence-based and locally accurate information regarding outcomes, success rates, and costs.