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Updated: Nov 12, 2025

Minimally Invasive Embryo Transfer and Embryo Vitrification at the Optimal Embryo Stage in Rabbit Model
Published on: May 16, 2019
Frozen-thawed embryo transfers: time to adopt a more "natural" approach?
Bruce D Pier1,2, Logan M Havemann3, Alexander M Quaas4,5
1Division of Reproductive Medicine, Madigan Army Medical Center, Tacoma, WA, USA. bruce.d.pier3.mil@mail.mil.
Abstract:
The increasing use of frozen-thawed embryo transfer (FET) cycles has magnified the focus on endometrial preparation protocols in assisted reproduction. Emerging evidence suggests that natural cycle (NC) FETs are associated with improved outcomes, and that providers should consider increasing the utilization of NC FET at the expense of the currently favored artificial cycle (AC) FET as primary method for endometrial preparation.

