Overview of sexing sperm.

Area of Science:

• Animal Science
• Reproductive Biology
• Biotechnology

Background:

• Artificial insemination (AI) with sexed sperm has led to numerous offspring across various species.
• Cattle represent the vast majority of pregnancies achieved using this technology, predominantly with frozen, sexed sperm.
• While the core sperm-sorting technology has seen minimal change, recent refinements have enhanced speed and reduced sperm damage.

Purpose of the Study:

• To review the current status and applications of sperm sexing technology in animal breeding.
• To highlight the advancements, challenges, and future prospects of commercialized sexed sperm.

Main Methods:

• Review of existing literature and commercial data on sperm sexing technology.
• Analysis of sperm sexing process, commercialization trends, and application outcomes.
• Evaluation of factors influencing pregnancy rates and successful implementation.

Main Results:

• Hundreds of thousands of offspring have been produced using AI with sexed sperm, predominantly in cattle.
• Commercialization of sexed sperm has accelerated, with production in multiple countries, though from a limited bull selection.
• Key applications include breeding dairy heifers to produce female calves, with slightly decreased pregnancy rates compared to conventional sperm.

Conclusions:

• Sexed sperm technology, despite high costs and implementation complexity, is increasingly commercialized for cattle breeding.
• Successful application requires stringent management, careful sperm handling, and skilled insemination.
• Declining costs are expected to drive wider adoption in cattle, horse breeding, and other niche species applications.