Stallion Anatomy Exam

Horses, Reproduction and Breeding

External Reproductive Organs Penis and Prepuce  The stallion’s penis consists of 3 parts: (1) the root or bulb, (2) the body or shaft, (the main part), and (3) the glans, the enlarged free end of the penis. When not erect, the penis is 50 cm long and 2.5 to 6 cm in...

Foal Heat Mares

Horses, Reproduction and Breeding

Postpartum mares will have a “foal heat” 7 to 14 days following foaling, and a second cycle approximately 30 days later. Breeding on foal heat is still somewhat of a controversial practice. Mares are usually bred on foal heat as long as three criteria are...
Twinning in Mares

Twinning in Mares

Horses, Reproduction and Breeding

Twinning in mares is very undesirable because of low survival rates, usually very weak foals, and numerous conformational problems. Of all twin pregnancies, 60% will birth a live single foal, 31% will abort both foals, and 9% will carry both twins to term. Of the 9%...

Understanding Horse Reproduction

Horses, Reproduction and Breeding

Many producers who raise horses find breeding horses rewarding, yet frustrating. Mares and stallions are traditionally placed in the breeding herd due to successful performance records, with little consideration for their reproductive capabilities. Horses are...
Horse Semen Collection

Horse Semen Collection

Horses, Reproduction and Breeding

Semen Collection  Collection with a breeding phantom In collecting semen from a stallion, a jump mare or breeding phantom is commonly used. Stallions can be easily trained to mount a breeding phantom. Those trained to mount a phantom make collection much safer and...