Improving your ovulation prediction skills

For pregnancy rates to be maximal, normal mares should be bred within 48 hours of ovulation. For mares bred artificially, insemination should be even closer to ovulation: within 24 hours for chilled semen and within eight hours for frozen semen. A major part of the practitioner’s work is the examination of mares to stage oestrus and predict ovulation. There are a wide range of parameters used to estimate the time of ovulation and thereby the optimum time for breeding.

The introduction of transrectal ultrasound technology to visualise the reproductive tract in mares has allowed cyclical changes in the ultrasonic morphology of the reproductive tract to be studied.

Both the ovaries and the uterus need to be examined thoroughly at every examination of a mare.

Ovarian features to note are:

  • Follicle size, softness and shape
  • Echogenicity and thickness of the granulosa layer
  • Presence of small echogenic particles within the follicular fluid

The interpretation of endometrial ultrasonic morphology also forms an important part of establishing an accurate estimate of the stage of oestrus.

For accurate prediction of ovulation, the genital tract should be evaluated daily by both palpation and ultrasonography.

Palpation remains a key component of the examination to identify all structures and provide information on their texture.


Feb 26 2021


1:00 pm - 2:00 pm

Local Time

  • Timezone: Asia/Manila
  • Date: Feb 26 2021
  • Time: 9:00 pm - 10:00 pm


THE Vet Exhibition Centre - Auditorium - Main Stream


  • Dr Jonathan Pycock
    Dr Jonathan Pycock

    Dr Jonathan F Pycock BVetMed PhD DESM MRCVS. Qualified from Royal Veterinary College, University of London in 1983. Currently and Equine Claims Consultant for The Veterinary Defence Society Limited and a Consultant for Equine Reproductive Services (UK) Ltd. Worked in various areas of the veterinary profession including teaching and research as well as clinical practice.

    A former President of the British Equine Veterinary Association (2017-2018). Developed a first opinion and referral equine practice from scratch. Participated in congresses, training courses and seminars all over the world. Either spoken or been a chairman of a session (or both!) at every BEVA Congress for the last thirty years. Acted as an expert witness for the Veterinary Defence Society on many occasions. Became one of three Equine Claims Consultants for the Veterinary Defence Society in 2012. Experienced in listening to problems faced by colleagues within the profession. Skilled in all forms of communication with individuals of various backgrounds. Long standing commitment to continuing professional development. Internationally recognised for writing and presentational skills. Well recognised sense of humour.

    Universally known throughout the veterinary equine profession. Obtained a Ph D from the Royal Veterinary College (1998). Awarded RCVS Certificate (1991) and Diploma (1994) in Equine Stud Medicine. Co-edited a major equine veterinary textbook. Written many book chapters in major equine textbooks. Lectured at all the major International Equine Veterinary Congresses including BEVA (30 times), American Association of Equine Practitioners (4 times), South African Equine Practitioners Group (4 times), World Equine Veterinary Association (3 times) and at the 2008 and 2018 Bain-Fallon Congress in Australia.

    Experienced horseman and avid squash player, off-piste skier, road cyclist and climber. Summited several major mountains in Europe including The Matterhorn and Mont Blanc. Enjoys outdoor pursuits with our two children. Following the Tour de France. Enjoying his 62 foot motor boat with family and friends in the South of France.