Published online by Cambridge University Press: 12 February 2021
Human reproduction is an inefficient process. Still today is no clear definition for recurrent implantation failure (RIF). It is a condition arising from the failure of a successive number of in vitro fertilization cycles (IVF) in which theoretically the pregnancy should have already been achieved. Due to the disparity in the implantation and pregnancy rates among different assisted reproduction centers, a consensus definition has not been achieved. Technological and scientific advances in the field of ART have led to better reproductive outcomes. Despite all the efforts, around 30 percent of healthy euploid embryos still fail to implant today ().
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