John Rinehart1. 1. Division of Reproductive Endocrinology and Infertility, Evanston Northwestern Healthcare, Evanston, IL, USA. jsrinehart@aol.com
Abstract
PURPOSE: An attempt to define recurrent implantation failure. METHODS: Literature review. RESULTS: Numerous definitions of recurrent implantation failure exist. The complexity and redundancy of the process of implantation makes a single definition difficult to determine. CONCLUSION: Each center must establish a definition of recurrent implantation failure based upon the data from that center. The definition of RIF used in our program requires the transfer of > or = 8, 8-cell stage embryos or > or = 5 blastocyst embryos.
PURPOSE: An attempt to define recurrent implantation failure. METHODS: Literature review. RESULTS: Numerous definitions of recurrent implantation failure exist. The complexity and redundancy of the process of implantation makes a single definition difficult to determine. CONCLUSION: Each center must establish a definition of recurrent implantation failure based upon the data from that center. The definition of RIF used in our program requires the transfer of > or = 8, 8-cell stage embryos or > or = 5 blastocyst embryos.
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