Granulosa Cell Tumor – Capable of affecting reproductive ability and overall disposition, the GCT is one of the most common ovarian tumors to be found in the mare. By Jos Mottershead Granulosa cell tumors – GCT – or granulosa-thecal cell tumors are one of the most common ovarian tumors to be found in equines. They are usually benign… Read More »
Early Embryonic Loss and Genetics – Chromosomal translocations in horses may be a cause of early pregnancy loss or pregnancy failure. Dr. Teri Lear discusses the issue. By Dr. Teri L. Lear Chromosomes are large segments of DNA wound around special proteins within each cell’s nucleus. They contain nearly all of the body’s genetic material. Horses have 64… Read More »
Failure of Passive Transfer in Neonatal Foals – low IgG – can lead to potentially fatal complications, but is easily managed in most with testing and supplementation By Jos Mottershead Foals are born with little or no immunity to infection from outside organisms. There is a minimal amount of immunoglobulin-M (IgM) produced in-utero, but insufficient to ensure adequate… Read More »
Protocols for Mare Management with Cooled-Shipped or Frozen Semen – methods to time breeding of mares both with and without use of pharmacological manipulation. By Jos Mottershead Mare management with cooled-shipped or frozen semen can often seem daunting but is a key element for success or failure. One can use or forgo pharmacological manipulation, and we discuss here… Read More »
The Semen Looked Bad – Or Is It? Maybe not as bad as you think! A review of what constitutes a cooled semen dose, looking at some newer research and older dogma. By Jos Mottershead and Kathy St. Martin During the course of the breeding season – especially on the EquineRepro Facebook Group that we manage – we… Read More »
Embryology – Different Stages of the Early Equine Pregnancy – Equine embryology – early pregnancy images. A pictorial showing embryonic developmental images through to the fetal stage of 50 days. All day numbers given here are the number of days post-ovulation on the conceiving cycle. The 32 to 64 cell stage of a developing embryo is the morula.… Read More »
Simple Methods for Predicting Foaling – A description of some of the most reliable and simple methods of predicting foaling – as well as less reliable techniques! By Jos Mottershead There are of course many signs of the approach of birth in the mare: “Softening” of the tail head and vulva; an increase in the size of the… Read More »
The Dirty Mare – Noted reproductive veterinarian Dr. Jon Pycock discusses techniques and methods related to successfully managing and breeding the dirty mare. By Dr. Jonathan F Pycock, B.Vet.Med., Ph.D., D.E.S.M., M.R.C.V.S. Equine Reproductive Services, Messenger Farm, Ryton, Yorkshire Introduction One of your main objectives whether owning or working with brood mares should be to produce the maximum… Read More »
Thawing Frozen Semen and Preparing it for Artificial Insemination. – Techniques and methods related to handling and thawing frozen semen prior to breeding a mare. Not as complicated as some might believe! By Jos Mottershead In order for maximum reproductive efficiency to be gained from the use of frozen equine semen, it is essential that the product be… Read More »
Mare Articles About Equine Reproduction – A selection of articles related to mare reproductive matters. Included are descriptors of evalutions, lab work, management and problems. Please Note: While we believe the information found on these pages to be accurate and up to date at the time of writing, it is provided here for informational purposes only, and is… Read More »
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