Current methods for preimplantation genetic diagnosis.

Preimplantation Genetic Diagnosis (PGD) used in assisted reproduction techniques is designed to provide help for couples trying to conceive a child, as it helps deliver healthy offspring. After in vitro fertilization, material is collected from the oocyte (polar body), 3-day-old embryo, or increasingly often, from the trophectoderm of a blastocyst. Selection of the diagnostic method depends on the testing center, but methods such as aCGH (Comparative Genomic Hybridization Array) and NGS (Next-Generation Sequencing) are supposed to have the highest reliability and precision. This paper presents a review of the most important methods used in PGD, their advantages and disadvantages as well as efficacy in the procedures in which they are used.

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