Bovine obstetrics / by M.G. de Bruin ; translated by W.E.A. Wyman.

  • Bruin, M. G. de.
Date:
1901
Catalogue details

Licence: In copyright

Credit: Bovine obstetrics / by M.G. de Bruin ; translated by W.E.A. Wyman. Source: Wellcome Collection.

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    development of this disease. Should lactation cease before the end of pregnancy, the patient impi-oves; while six to eight weeks after birth the disease becomes extensive (Friedberger and Fro liner). Calves borne by cows suffering with osteomalacia are often in good condition, making it appear that lime salts for the formation of the osseous frame of the foetus were furnished at the expense of the mother. Cows in the second half of pi’egnancy often suffer with indigestion; it being rare when they are fed properly. In certain localities, however, where for economical reasons a voluminous diet, often difficult of digestion, is furnished, digestive disturbances in the pregnant animal result. 9.—Superfecundation and Superfoetation. By superfecundation is understood the fertilization of two or more eggs of one oestrum at short intervals; this making it possible that one ovum is fecundated by one bull and the other ovum by another bull. At birth the mother bears two young created by different males. In the cow this is ex- ceedingly rare. By superfoetation we understand conception during preg- nancy. This has been seen occasionally in the cow. As a rule, the second conception induces abortion of the first foetus; but it happens that one calf is carried the full term, and the other is aborted, that both calves are retained or both foetuses are aborted. f