Embryo transfer-the who, what, when, how, and why does it matter?

Abstract

Embryo transfer is the ultimate step in the in vitro fertilization process and is the culmination of months to years of preparation. Many factors contribute to embryo transfer success before, during, and after the transfer. This series is a comprehensive review of the factors that converge to influence embryo transfer success. Robust discussion is included regarding the impact of the physician who performs the transfer, adjunct therapies used, timing of embryo transfer, endometrial receptivity, and resultant health of the pregnancy and offspring.

Keywords: Assisted reproductive technology; ERA; embryo transfer; frozen embryo transfer; luteal support; modified natural cycle; natural cycle; programmed cycle.