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Utero-tubal Embryo Transfer and Vasectomy in the Mouse Model
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Pressure changes during embryo transfer.

Cezary Grygoruk1, Piotr Sieczynski, Piotr Pietrewicz

  • 1Center for Reproductive Medicine BOCIAN, Bialystok Technical University, Bialystok, Poland. cezary.grygoruk@gmail.com

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Summary

Embryo transfer (ET) can create rapid, high-pressure changes in the transferred fluid. Gentle embryo transfer with minimal ejection speed is recommended to protect embryos from steep pressure gradients.

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Area of Science:

  • Reproductive medicine
  • Biomedical engineering
  • Fluid dynamics

Background:

  • Embryo transfer (ET) is a critical step in assisted reproductive technologies.
  • Understanding the physical forces experienced by embryos during ET is essential for improving success rates.

Purpose of the Study:

  • To investigate the pressure dynamics within the transferred fluid during mock embryo transfer (ET).
  • To quantify the pressure changes and their relationship with ejection speed.

Main Methods:

  • Laboratory simulations were conducted using a rigid, transparent uterine model.
  • A pressure sensor was integrated into the model to record pressure changes during simulated ET.
  • Experimental setup involved academic and private reproductive medicine centers.

Main Results:

  • Injection during mock ET caused local pressure increases up to 155 mm Hg in less than 0.1 seconds.
  • Observed pressure increase and decrease slopes reached up to 72,000 mmHg/s and 144,000 mmHg/s, respectively.
  • Pressure buildup was directly proportional to the ejection speed of the transferred fluid.

Conclusions:

  • Embryo transfer can induce rapid and significant pressure fluctuations in the transferred liquid.
  • Minimizing ejection speed during ET is advisable to avoid exposing embryos to steep pressure gradients.
  • Gentle embryo transfer techniques may enhance embryo viability and implantation rates.