Tag Archives: Gonadotropin-releasing hormone

Stallion Behavior Problems

This post briefly outlines several of the most common behavior problems of breeding stallions. These problems include self-mutilation, inadequate libido, rowdy breeding behavior, specific erection dysfunction, mounting and thrusting difficulties, frenzied hyperactive behavior, and specific ejaculation dysfunction. Also briefly outlined is the common problem of residual stallionlike behavior in geldings. Inadequate Libido Specific stallion libido… Read More »

Oocyte Transfer

Oocyte transfer is the placement of a donor’s oocyte into the oviduct of a recipient. The recipient can be inseminated within the uterus or within the oviduct. Placement of the oocyte and sperm within the recipient’s oviduct is more accurately termed gamete intrafallopian transfer (GIFT). The first successful oocyte transfer was done in 1989; however,… Read More »

Preparation Of The Mare For Artificial Insemination

The ultimate goal of insemination is to provide semen in a time frame that coordinates the availability of capacitated spermatozoa with the arrival of the transported oocyte within the mare’s oviduct. It is also the responsibility of the veterinarian to ensure the optimum intrauterine environment that supports the developing embryo. With these objectives in mind,… Read More »

Induction of Ovulation

Hormonal induction of ovulation is a common breeding management practice in the equine industry. Ovulation induction is routinely performed if the stallion is in high demand, if semen is limited, or if a single insemination is desired (i.e., for mares with a severe persistent postmating inflammatory response). Induction of a timed ovulation may also be… Read More »

Photoperiod Manipulation

In many breed types, the greater economic value of early-born foals has made early induction of estrus cyclicity in mares the “Holy Grail” of reproductive management. Springtime (vernal) transition from anestrus into the breeding season, marked by the first ovulation of the year, does not take place until the first week of April, essentially without… Read More »