FAQ


Frequently Asked Questions about sexed semen and SiryX.

SiryX staws      SiryX calf

 

What is the situation on the availability of SiryX?


  • Answer
  • Every effort will be made to meet the demands from our customers, but the possibility of waiting lists and orders being delivered in batches cannot, unfortunately, comletely be excluded.

       SiryX semen

    Why are producers being advised to use SiryX on maiden heifers?


  • Answer
  • Maiden heifers are easier to get in calf than cows. To breed heifer calves from your best cows, more inseminations and semen will be needed. This will also result in longer calving intervals. Therefore using SiryX on maiden heifers will offer greater economic advantages.

      SiryX semen

    Can SiryX also be used on cows?


  • Answer

  • Clearly SiryX can also be used on cows. Due to the lower semen fertility of SiryX, more inseminations and semen will be needed when it is used on cows, compared to when used on maiden heifers.

      SiryX semen

    Why is the fertility of SiryX semen lower?


  • Answer

  • To produce SiryX semen is processed and, as a result, the semen has a lower vitality and a shorter lifespan. The impact of this on conception rates is less in maiden heifers compared to older cows. A possible explanation is the size of the uterus and fallopian tubes in productive cows, where the less vital sexed semen has less chance to reach the ovum compared to maiden heifers.Why is SiryX available from bulls with calving ease figures of <100, while the advice is to use SiryX on maiden heifers?
    When using SiryX the percentage of heifer calves born will be around 90%. On average, heifer calves cause fewer calving difficulties. The risk then involves the approximately 10% of bull calves, from bulls with calving ease figures below 100, that will be born out of heifers. Most SiryX sires have favourable calving ease figures, but there are some with below average scores.

      SiryX semen

    Why is the price of SiryX higher than conventional semen?


  • Answer
  • As with conventional semen, the price per straw is mainly based on the bull's semen production and the expected demand. Processing the semen into SiryX is very costly because of the cost of the machines that are used for semen sexing, the slow production process and the fact that not all the semen can be used. For the production of one dose of SiryX an average seven doses of conventional semen are needed. The cost price of SiryX is, therefore, higher than conventional semen.

      SiryX semen