Glossary · Definition · v2026.3
Fresh Embryo Transfer
A fresh transfer is an embryo transfer performed in the same cycle as egg retrieval, typically on Day 3 or Day 5 of embryo development. Fresh transfers avoid the freeze-thaw process but may occur in a suboptimal endometrial environment.
When Fresh Transfer Is Used
Fresh transfers occur in the same cycle as retrieval, without freezing the embryo. They avoid the cost and logistics of a separate FET cycle. However, the elevated estrogen environment from stimulation may negatively affect endometrial receptivity. Fresh transfers are less common in modern practice due to the trend toward freeze-all strategies.
Biological Constraints
Fresh transfer carries a higher risk of OHSS when combined with pregnancy-related hCG. In high-responder patients, freeze-all is the safer approach. Outcomes with fresh versus frozen transfer are comparable in most studies, with some data suggesting slightly higher live birth rates with frozen transfers in certain populations.
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This content defines terminology for educational orientation. It does not constitute medical advice.
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