embryo transfer
Also written as: ET — Embryo Transfer
Procedure to place fertilized embryos into the uterus during ART cycles.
Full Definition
Embryo transfer is the final step in the in vitro fertilization process, involving the placement of one or more embryos into the uterine cavity through the cervix using a thin catheter. The procedure is typically performed 3-5 days after egg retrieval, depending on embryo development stage. Embryos may be transferred at the cleavage stage (day 3) or blastocyst stage (day 5-6). The number of embryos transferred is carefully considered to balance pregnancy success rates with the risk of multiple pregnancies. The procedure is usually painless and performed without sedation, though some clinics may recommend a full bladder to facilitate visualization during ultrasound guidance.
Usage
Usage note: May be abbreviated as ET in clinical notes, but spell out in patient communication.
In Context
- "The embryo transfer was performed on day 5 using ultrasound guidance." — Medical record
- "Single embryo transfer policies have reduced multiple pregnancy rates without significantly affecting success." — Clinical research