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Related Experiment Videos

Fertilization by sperm injection in the rabbit.

C L Keefer1

  • 1Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens 30602.

Gamete Research
|January 1, 1989
PubMed
Summary

Sperm injection into rabbit and hamster eggs successfully created male pronuclei. Capacitated sperm or sperm nuclei resulted in higher activation rates, showing potential for in-vitro fertilization and embryo development.

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Area of Science:

  • Reproductive Biology
  • Cell Biology
  • Developmental Biology

Background:

  • Sperm capacitation is crucial for fertilization.
  • Understanding sperm-oocyte interactions is key to reproductive success.

Purpose of the Study:

  • To investigate the efficacy of sperm injection for activating oocytes.
  • To compare the effects of capacitated versus uncapacitated sperm on oocyte activation.

Main Methods:

  • Microinjection of whole rabbit spermatozoa and isolated sperm nuclei into hamster and rabbit oocytes.
  • In-vitro culture of injected oocytes.
  • Assessment of sperm decondensation, male pronuclei formation, and oocyte activation.

Main Results:

  • Injected sperm decondensed and formed male pronuclei in vitro.
  • Capacitated ejaculated sperm or sperm nuclei significantly increased oocyte activation compared to uncapacitated sperm (P < 0.01).
  • Fertilized rabbit oocytes underwent normal cleavage divisions within 22 hours.

Conclusions:

  • Sperm injection is a viable method for inducing oocyte activation and male pronuclei formation.
  • Sperm capacitation significantly enhances the success rate of sperm injection procedures.
  • This technique holds promise for assisted reproductive technologies and studying fertilization mechanisms.

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