The Visual Guide to
Equine Reproduction
Teratology: Congenital Anomalies
![Hydrocephalic Skull.](images/eq00799.jpg)
Hydrocephalic Skull.
Cranium opened up to see the enlarged cerebral ventricles. The distended cranium is very thin.
Shipley C (2006)
![Hydrocephalic Cranium.](images/eq00800.jpg)
Hydrocephalic Cranium.
Cranium opened up to see the dilated cerebral ventricles. The distended cranium is very thin.
Shipley C (2006)
![Neonatal Isoerythrolysis.](images/eq00008.jpg)
Neonatal Isoerythrolysis.
This 4-day old foal shows severe hemolytic icterus indicative of isoerythrolysis.
Drost M (1967)
![Male Pseudohermaphrodite.](images/eq00023.jpg)
Male Pseudohermaphrodite.
Male pseudohermaphrodite. The testes were intra-abdominal.
Roberts SJ (1972)
![True Hermaphrodite.](images/eq00197.jpg)
True Hermaphrodite.
This animal was a true hermaphrodite possessing ovotestes. The external genitalia were represented by a grossly enlarged clitoris / underdeveloped glans penis.
Roberts SJ (1972)
![Epitheliogenesis Imperfecta.](images/eq00045.jpg)
Epitheliogenesis Imperfecta.
Atypical epitheliogenesis imperfecta. Defective epitheliogenesis is usually confined to the limbs, from the knees and the hock down, and to the muzzle.
Drost M (1971)
![Birth Defects.](images/eq00165.jpg)
Birth Defects.
This Shetland pony foal was born with an enlarged head and ankylosed limbs.
Utrecht (1975)
![Severely Contracted Tendons.](images/eq00164.jpg)
Severely Contracted Tendons.
The rear fetlocks are severely contracted in this Shetland pony foal.
Utrecht (1975)
![Premature Foal.](images/eq00562.jpg)
Premature Foal.
Live premature foal that was unable to stand. Was in respiratory distress. Notice the eponychia that are still present. Tile size 15 square cm.
Buergelt CD (1999)
![Deformed Rear Pasterns.](images/eq00561.jpg)
Deformed Rear Pasterns.
Hyperflexibility of the flexor tendons of the rear pasterns.
Buergelt CD (1999)
![Deformed Front Pasterns.](images/eq00803.jpg)
Deformed Front Pasterns.
Congenital hyperflexibility of the flexor tendons of the front pasterns.
Shipley C (2006)
![Deformed Front Pasterns.](images/eq00804.jpg)
Deformed Front Pasterns.
Congenital hyperflexibility of the flexor tendons of the front pasterns.
Shipley C (2006)
![Unilateral Contracted Tendon.](images/eq00565.jpg)
Unilateral Contracted Tendon.
Unilateral contracted pastern tendon.
Buergelt CD (1999)