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Author Spotlight: Surgical Methods and Outcomes in Oviductal Cloned Pig Embryo Transfers
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Embryo Transfer Surgery via Laparotomy in Gilts.

Michelle Silva Araujo1, André Pegoraro Poor2, Valéria Vieira Chida2

  • 1Centro de Estudos sobre o Genoma Humano e Células-Tronco, Instituto de Biociências, Universidade de São Paulo; msa.vet@hotmail.com.

Journal of Visualized Experiments : Jove
|November 4, 2024
PubMed
Summary
This summary is machine-generated.

This study details a safe and rapid surgical technique for transferring cloned pig embryos into gilts

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Area of Science:

  • Reproductive Biology
  • Surgical Techniques
  • Biomedical Research

Background:

  • Somatic cell nuclear transfer (SCNT) is crucial for producing genetically modified pigs for research.
  • Efficient embryo transfer is essential for the success of SCNT programs.
  • Oviductal transfer is a common method for pig embryo implantation.

Purpose of the Study:

  • To demonstrate a surgical protocol for oviductal transfer of cloned pig embryos.
  • To assess the safety and efficacy of the surgical technique in gilts.
  • To evaluate early pregnancy outcomes following embryo transfer.

Main Methods:

  • Hormonal synchronization and laparotomy were performed on nine gilts.
  • Cloned pig embryos (up to 4 cells, day 2) were surgically transferred to the oviduct.
  • Pregnancy was monitored via ultrasound at 30 days; necropsy was performed at 60 days.

Main Results:

  • Six of nine gilts showed initial signs of pregnancy on ultrasound.
  • No fetal development progression was observed by day 60.
  • Adhesions were noted in the reproductive tracts; some early embryonic structures were recovered.

Conclusions:

  • The oviductal embryo transfer surgical technique is rapid and safe in gilts.
  • Low efficiency of cloned pig embryo transfer, influenced by embryo quality and quantity, remains a challenge.
  • Further optimization is needed to improve pregnancy success rates in cloned pig production.