Cuapter III. 
ANOMALIES OCCURRING IN GESTATION. 
Superfcetation. 
By this term is meant the conception of an already 
pregnant animal. 
Facts have been recorded, by a number of com- 
petent authorities, which go to prove that this condition 
is not only possible, but probable. : 
Cases have been observed amongst the unipare, 
one of which is where a Mare gave birth to a horse-foal 
and a mule-foal at the same parturition. 
Extra-Uterine Gestation. 
The foetus here is developed in the abdomen, but 
outside of the uterine cavity. The foetus may be 
healthy, and normally developed, for a certain period of 
its existence, but generally dies before the termination 
of gestation. Sometimes the foetus is developed in the 
ovary (‘‘Ovarian Gestation”); or, it may be outside 
the tissue, but inside the covering of the ovary. 
Sometimes it is developed in one of the Fallopian 
Tubes (“Tubal Gestation”); sometimes between the 
tissue of the walls of the uterus (“Interstitial Gesta- 
tion”). The most common situation, however, is in 
the abdomen (‘‘ Abdominal Gestation”). ‘In this case 
the foetus is attached to some part of the abdominal 
wall, and is supplied with its membrane, and draws its 
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