Abstract
Objective: To determine whether in vitro fertilization (IVF), frozen replacement cycles offer better outcomes than fresh cycles in order to support, or not, a possible shift towards total replacement of fresh IVF/intracytoplasmic sperm injection (ICSI) cycles from frozen elective transfers (FETs). Study design: Systematic review; opinion paper. Results: Initial results seem to support a shift in current practice towards frozen cycles. Conclusion: Initial results may support replacement all fresh IVF/ICSI cycles with FETs, as this could be a safer and equally effective strategy. However, robust evidence from randomized controlled trials is needed if this will be generally applied.
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