Optimizing the technique of embryo transfer.
OBJECTIVE
To review currently available literature on various technical aspects of the ET procedure.


METHODS
Publications related to ET technique were identified using PubMed and Medline.


RESULTS
Numerous technical aspects of the ET procedure have been studied to determine their effect on pregnancy outcome. Although much of the published data that evaluates these factors is conflicting or confounded, good and consistent evidence does appear to support the following: optimizing the "ease" of the transfer, ultrasound guidance, and soft catheters. Limited evidence also supports trial transfers, removal of cervical mucus, deposition of embryos in the midportion of the uterus, avoiding negative pressure from the catheter, and completion of the procedure in a timely manner.


CONCLUSIONS
Although there is no consensus on the optimal technique of ET, there is evidence that certain methods in the ET are associated with improved outcomes after IVF.
Mains
Lindsay
L
Division of Reproductive Endocrinology and Infertility, University of Iowa Hospitals and Clinics, Iowa City, Iowa 52242, USA.
Van Voorhis
Bradley J
BJ
D002138:Calibration; D002404:Catheterization / Q000592:standards; D002986:Clinical Trials as Topic; D004624:Embryo Transfer / Q000379:methods* / Q000592:standards* / Q000639:trends; D019317:Evidence-Based Medicine; D005260:Female; D017408:Guidelines as Topic; D006801:Humans; D011182:Postoperative Care; D011247:Pregnancy; D011300:Preoperative Care / Q000379:methods; D018084:Ultrasonography, Interventional / Q000379:methods