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Related Experiment Videos

Non-surgical embryo transfer in cattle.

H R Tervit1, M W Cooper, P G Goold

  • 1Ruakura Animal Research Station Private Bag Hamilton, New Zealand.

Theriogenology
|January 1, 1980
PubMed
Summary

Non-surgical embryo transfer in cattle using a straw technique achieved pregnancy rates comparable to surgical methods. Success rates were significantly influenced by embryo quality and transfer speed, highlighting key factors for improved bovine reproduction.

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Area of Science:

  • Veterinary Medicine
  • Animal Reproduction
  • Embryo Transfer Technology

Background:

  • Surgical embryo transfer has been the standard for bovine reproduction.
  • Non-surgical methods aim to improve efficiency and reduce invasiveness.
  • Optimizing non-surgical techniques is crucial for widespread adoption in cattle breeding programs.

Purpose of the Study:

  • To evaluate the efficacy of a non-surgical embryo transfer technique in cattle using a flexible catheter and straw.
  • To compare pregnancy rates achieved with different embryo ages and transfer methods.
  • To identify factors influencing the success of non-surgical embryo transfer.

Main Methods:

  • Embryos were collected surgically from superovulated donors and transferred non-surgically to synchronized recipients.

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  • Two non-surgical methods were employed: a flexible catheter and a Cassou inseminating gun (straw technique).
  • Pregnancy rates were assessed by palpation and confirmed by embryo survival at slaughter.

    • Main Results:

    • The straw technique resulted in higher pregnancy rates (63%) compared to the catheter method (19%) for 7-8 day old embryos in 1977.
    • In 1978, 45% pregnancy rate was achieved with the straw technique, significantly influenced by embryo quality (64% for good quality vs. 22% for poor quality).
    • Faster transfer times correlated with higher pregnancy rates (P<0.10).

    Conclusions:

    • Non-surgical embryo transfer using the straw technique is a viable alternative to surgical methods in cattle.
    • Embryo quality and rapid transfer are critical factors for successful non-surgical embryo transfer.
    • Further refinement of non-surgical techniques can enhance bovine reproductive efficiency.