Jonathan F. Pycock, B. Vet. Med, PhD, DESM, MRCVS

Jonathan F. Pycock, BVetMed, PhD, Dipl. ESM, MRCVS, operates Equine Reproductive Services, a first opinion and referral private equine practice based in Yorkshire, England. He has published many papers and book chapters on a variety of equine reproductive topics, and edited the book Equine Reproduction and Stud Medicine. His main interests include ultrasonography, breeding the problem mare, and artificial insemination. Currently, he is evaluating the use of oxytocin and depot oxytocin as a post-breeding treatment for mares.

Articles by Jon Pycock

Live Cover Management

Many breed registries still require breeding be done by live cover--the stallion physically covers the mare. The actual mating process is an awesome spectacle, but can be dangerous to the mare, stallion, and handlers when done in hand-breeding Read More

Mare Breeding Problems: Make Room for Baby

One of your main objectives whether you own or work with broodmares should be to produce the maximum number of live, healthy foals from the mares bred during the previous season. Read More

Breeding Soundness Exam of the Mare

Horse breeding is a time-consuming and expensive business. Therefore, horse breeders must be able to assess the likelihood of a mare being able to conceive, carry a fetus through a pregnancy, and deliver a live foal. While unforeseen problems ca Read More

Management of Twins: Have We a New Option?

As has been discussed in earlier issues of The Horse, twinning is highly undesirable in the mare. The advent of ultrasound has allowed earlier detection of multiple pregnancies from around Days 14 to 16 post-breeding, and the majority of Read More

Breeding on Foal Heat

The mare has a long gestational period and to be a yearly producer she must be back in foal, on average, 25 days from giving birth. It is important to understand all the processes that take place in the period from parturition to the restoration Read More

Breeding With Chilled and Frozen Semen

Artificial Insemination (AI) involves the introduction of sperm into the reproductive tract of the mare without natural mating. AI in the horse was first practiced long ago. Ancient Arabian texts describe how mares were successfully inseminated. Read More

Endometritis Classifications and Treatment

Many mares which cycle, but fail to conceive, have infections in their reproductive tracts. Hence, they are sometimes called "dirty" mares. The more scientific term for their problem is endometritis, which refers to the acute or chronic Read More

Early Embryonic Death

For all horse breeders, it is important to realize that not every mare will give birth to a live foal. Failure of the pregnancy can occur at any stage starting from the fertilization of the oocyte or egg. The oocyte develops in the fluid- filled Read More