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Sexed Semen

Get more high genetic merit heifer calves with LIC sexed semen.

A selection of LIC’s top bulls are available in SexedULTRA 4M® semen.

This is the most advanced technology in the market today – giving farmers a 90% chance of producing a female calf.


As part of a well-managed breeding programme sexed semen can help you:

- Breed your herd’s next generation from your best cowsHet more high genetic merit heifer calves with LIC sexed Semen

- Boost genetic gain

- Reduce bobby calf numbers

- Create opportunities from surplus calves

- Target the market with beef-cross calves

- Drive more profit to your bottom line.

View LIC UK's Sexed bull teams


Considerations for using sexed semen

There are wider considerations to keep in mind to optimise sexed semen on farm.

A New Zealand trial showed that frozen sexed semen thawed at room temperature averaged 13% lower conception rates compared to conventional semen.

Europe and US trials showed that frozen sexed semen thawed at 37 degrees Celsius and inseminated 16 hours after a standing heat resulted in a 3% to 6% difference between sexed and conventional semen.*

Execute a well-managed plan to reap the benefits of sexed semen. 

- Mate yearling heifers to sexed semen – they have higher conception rates than milking cows.

- choose bulls suitable for yearling mating

- pregnancy scan early to identify cows in-calf to AI bulls

- mate heifers 10 days before the main herd

- avoid mix-ups by calving cows in-calf to AI bulls separately to cows in-calf to stock bulls

- use strict criteria when selecting cows for sexed semen. For example, young, high genetic merit, healthy, early-calved and cycling cows

- mate selected cows before your herd’s mating start date. Move the mating start date forward if necessary

- ensure herd fertility is high before you consider using sexed semen

- be certain cows are on full standing heat before mating with sexed semen. If you're unsure use a conventional straw

- have plenty of stock bulls ready to cover returning cows. For example, two teams of one bull to three non-pregnant cows if using two-year-old bulls, plus spares

- follow STgenetics® handling and insemination instructions for SexedULTRA 4M®.

Download handling and insemination instructions


Maximise herd improvement and profits on your farm with targeted use of LIC sexed semen.

Contact your farm solutions manager to discuss sexed options for your herd.

*Trial information provided by STgenetics®