A text-book of veterinary obstetrics : including the diseases and accidents incidental to pregnancy, parturition and early age in the domesticated animals . in about tenminutes, sometimes in live—tliouj^h it may extend to a quarter or halfan hour, rarely more. This rapidity appears to be due to the fact tliattlie placenta is detached from the uterus during the early pains, andconsequently the ftrtus cannot live long after this occurs—three hoursbeing supposed to be the limit—unless it can breathe by the duration in the Cow is, on the average, one to two hours; thoughit may only be a
A text-book of veterinary obstetrics : including the diseases and accidents incidental to pregnancy, parturition and early age in the domesticated animals . in about tenminutes, sometimes in live—tliouj^h it may extend to a quarter or halfan hour, rarely more. This rapidity appears to be due to the fact tliattlie placenta is detached from the uterus during the early pains, andconsequently the ftrtus cannot live long after this occurs—three hoursbeing supposed to be the limit—unless it can breathe by the duration in the Cow is, on the average, one to two hours; thoughit may only be a few minutes to half an hour, or be extended, withoutinjury to the Calf, to one or two days. With Cows at pasture or whichdo no work, it is sometimes only fifteen minutes. With the Sheep theperiod is also brief, being about fifteen minutes. If there are severalLambs, there is usually an interval of fifteen minutes to two hoursbetween them—the second and succeeding births being always quickerthan the first. With multiparous animals—Sow, Bitch, and Cat—there is ordinarilya period of ten or fifteen minutes, and sometimes half an hour, an hour. Fig. IS THK Act ok Parturition : Rkcimrest or even more, between each birth. Not unfrequently the Sow willbring forth ten young ones within the course of an hour. We have mentioned that with those animals which are delivered ina standing position, the umbilical cord is ruptured when the youngcreature reaches the ground, and usually close to its abdomen. If themother is recumbent when the olVspring is born, the cord is torn as shegets up, which is usually immediately after parturition. The circula-tion in and by the cord being incomplete shortly before and duringlabour, its texture appears to undergo a kind of softening that favoursrupture ; while owing to the vessels being reduced in size, and also theway in which their rupture occurs, hjrmorrhage is trifling. Sometimes,however, the cord is sutViciently strong
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