Does catheter choice during embryo transfer alter the pregnancy rate?

Area of Science:

• Reproductive Medicine
• In Vitro Fertilisation (IVF)
• Embryo Transfer (ET)

Background:

• Embryo transfer (ET) is a critical step in in vitro fertilisation (IVF) impacting pregnancy rates (PR).
• Catheter type and transfer technique are debated factors influencing ET success.
• This study evaluates the impact of two distinct ET catheters on IVF outcomes.

Purpose of the Study:

• To compare the clinical pregnancy rate (CPR) using two different embryo transfer (ET) catheters.
• To assess the influence of catheter type on the rate of difficult embryo transfers.

Main Methods:

• Prospective analysis of 1,446 embryo transfers (ETs) in women undergoing IVF.
• Randomized comparison between the Frydman catheter (723 cycles) and the Cook catheter (723 cycles).
• Primary endpoint: clinical pregnancy rate (CPR); Secondary endpoint: difficult transfer rates.

Main Results:

• The Cook catheter showed a slightly higher pregnancy rate, but the difference was not statistically significant compared to the Frydman catheter.
• No significant difference in clinical pregnancy rates (CPR) was observed between the two catheter types.
• The ease of embryo transfer did not significantly affect pregnancy rates.

Conclusions:

• Individual factors like catheter type may not significantly influence IVF success.
• A comprehensive, holistic approach considering all aspects of embryo transfer is essential for improving IVF pregnancy rates.