Location of the embryo-transfer catheter guide before the internal uterine os improves the outcome of in vitro fertilization

Fertility and Sterility
Vicente G AbdelmassihR Abdelmassih


The objective of this study was to assess whether positioning the embryo transfer (ET) catheter guide at the time of embryo expulsion, before or beyond the internal os, has an impact on IVF cycle outcome. We performed a retrospective study comparing IVF outcomes in relation to the ET guide position relative to the internal uterine os. We analyzed ultrasound-guided ETs in IVF-intracytoplasmic sperm injection (ICSI) cycles, performed with the tip of the ET catheter guide just before the internal os (group 1) and beyond the internal os (group 2). Implantation and pregnancy rates were significantly better in group 1 than in group 2, at 14.8% versus 11.8% and 57.3% versus 43.1, respectively. We conclude that passing the ET catheter guide beyond the internal os reduces implantation and pregnancy rates.


Aug 12, 1978·Lancet·P C Steptoe, R G Edwards
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Dec 1, 1986·Journal of in Vitro Fertilization and Embryo Transfer : IVF·M LeongH Chan
Jan 1, 1993·Journal of Assisted Reproduction and Genetics·T al-ShawafI Craft
May 15, 1999·Human Reproduction·A K KanO O Ola-ojo
Jul 19, 2000·Fertility and Sterility·R M Hearns-StokesJ H Segars
Nov 13, 2001·Fertility and Sterility·William B SchoolcraftD K Gardner
Mar 1, 2002·Human Reproduction·Hans G I van WeeringPeter G A Hompes
Sep 7, 2002·Fertility and Sterility·Juan A García-VelascoCarlos Simón
Sep 28, 2002·Human Reproduction·Candido TomásHannu Martikainen
Jun 14, 2005·European Journal of Obstetrics, Gynecology, and Reproductive Biology·Dilek AslanJehoshua Dor

Related Concepts

Cervix Uteri
Blastocyst Transfer
Fertilization in Vitro
Retrospective Studies
Ultrasonography, Intravascular
Pregnancy Rate
Sperm Injections, Intracytoplasmic
Surgery, Computer-Assisted

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