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Michigan State College
Abstract
Data are presented on 403 parturitions from 102 Belgian and Percheron mares
Thirteen pairs of twins were recorded but in only two pairs did both members survive. These findings indicate that two developing embryos are too much of a burden for the uterus of the mare in most cases.
1 Journal article number 557 (N.S.) of the Michigan Agricultural Experiment Station, East Lansing, Mich. Data for this paper were taken from a Master's thesis submitted by the senior/author to the Graduate School of Michigan State College.
2 The authors acknowledge the assistance of Professor H. R. Hunt.
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