The diseases of the genital The diseases of the genital organs of domestic animals diseasesofgenita00willrich Year: 1921 48 Diseases of the Genital Orga)is mg, or standing to be mounted by, other animals of its species. The ewe ordinarily shows little or no evidence of estrum except in the presence of the male. In certain pathologic cases (nymphomania) the cow especially does not confine her expressions of sexual desire to her own kind, but may attempt to mount other species of animals. In all animals there is a tendency during estrum for the female to wander from home. This is most noticeab
The diseases of the genital The diseases of the genital organs of domestic animals diseasesofgenita00willrich Year: 1921 48 Diseases of the Genital Orga)is mg, or standing to be mounted by, other animals of its species. The ewe ordinarily shows little or no evidence of estrum except in the presence of the male. In certain pathologic cases (nymphomania) the cow especially does not confine her expressions of sexual desire to her own kind, but may attempt to mount other species of animals. In all animals there is a tendency during estrum for the female to wander from home. This is most noticeable in the bitch and the cat, which, if not securely confined, disap- pear, tending to wander long distances and to remain away during a large part or all of the estrual period. The sexual wanderings of domestic animals constitute an interesting chapter in the dissemination of infectious diseases. Fig. 23—Section of ovary of cow showing- a follicle of 2 mm., with ovum. The female exhibits sexual desire only for a compara- tively brief time, during the existence of a ripe ovisac or ovisacs in the ovary. The duration of the estrual period varies widely, according to species. It is shortest in the cow, ranging ordinarily between eighteen and twenty-four hours, or a trifle longer. The mare is usually in estrum for several days. The bitch is in estrum for ten to fifteen days. In healthy females, the estrual cycle is quite uniform. In the cow it is twenty to twenty-two days, usually twenty-one; in the mare 3 to 4 weeks; in the bitch ordinarily every six months. The frequency, intensity, and duration of estrum are profoundly modified by the state of nutrition, diseases of the genital organs, and by serious systemic diseases.
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