02/09/2026
With tupping already underway with some of our clients and many due to start in the next few weeks it's important to assess the ram's fertility to avoid poor conception rates, particularly with the impaxt of Bluetongue.
The Sheep Veterinary Society have launched their advice as to timings and testing to avoid any costly poor performance in rams.
Please give us a call to discuss ram fertility with a vet
Guidelines on the examination of rams for breeding – a BTV update from The Sheep Veterinary Society...
• In order to achieve conception rates in excess of 85% of ewes in the first cycle ram health and fertility must be optimal.
• Bluetongue virus (BTV) replicates in the testicles in infected rams, causing significant impact on s***m production. This is in addition to the general effects on fertility of the high temperature and blood vessel damage making animals unwell.
• Rams do eventually recover s***m production but their fertility for the coming season is expected to be very poor.
• The time taken for s***m to develop is 50 days and recovery of breeding soundness after BTV infection is considered to be up to 100 days therefore there are long lasting impacts on ram fertility for the current season.
• Ram MOTs and electro-ejaculation (EEJ) should only be carried out by those trained and competent in the techniques.
• Given the ongoing risk to fertility, unvaccinated ram assessment should happen as close to mating as possible to be useful at the time of mating but sufficiently in advance that alternative
ram power can be sought if necessary.
• However, please be aware that BTV infection after a successful ram MOT test can still impact fertility, making vigilance and vaccination essential.
• Vigilance should include checking for clinical signs in all animals daily, using raddle on rams to detect returning ewes and scanning early.
• The standard advice remains that every ram should be physically examined every year (however
note that this does not necessarily mean that EEJ should be included).
• It is not considered acceptable to perform EEJ on any ram that fails the first stage of a ram MOT and no ram should be condemned on the basis of an single unsuccessful EEJ.
This information is made available with thanks to Sheep Veterinary Society