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SHARING OPTIONS: More beef calves on the ground and less dairy bull calves should be the aim of sexed semen The future prospects for sexed semen use in Ireland got a boost recently with the news that Teagasc and AI companies are setting up a new sexing lab. While it won’t be ready for this spring, it should be ready for the 2022 breeding season. Last year was probably the first time that dairy farmers in Ireland used sexed semen in good numbers. Figures from the ICBF suggest that upwards of 30,000 to 40,000 inseminations of sexed straws were used last year, which represents about 3-4% of all inseminations, so it is still relatively niche. ....
Synchronisation can help to tighten up the calving pattern of heifers. \ Donal O Leary As most livestock farmers will be aware, a healthy cow or a post pubertal heifer will have a heat (oestrus) every 21 days or so. I say “or so” because the actual normal range is 18 to 24 days. On the laws of probability, if you have 100 females in a group, between four and five will come into heat every day over the 21-day cycle. The purpose of a synchronisation programme is two-fold. Firstly it condenses the animal’s naturally occurring heats into a shorter period and, secondly, hormone treatment can bring forward a heat and get an animal back cycling sooner. ....