Observations on corpora lutea. Part 1 [-2] / By Robert Paterson, M.D., physician to the Leith Dispensary.

  • R.H. Paterson
Date:
[1840?]
Catalogue details

Licence: Public Domain Mark

Credit: Observations on corpora lutea. Part 1 [-2] / By Robert Paterson, M.D., physician to the Leith Dispensary. Source: Wellcome Collection.

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    In such cases, as the substance of the corpus luteum becomes absorbed, these irregular striae become more visible, and, in conse¬ quence of the diminished quantity of the glandulose substance, gradually assume the appearance of a central, puckered, and extremely irregular cicatrix. In disappearing, the colour of the corpus luteum in this animal varies; assuming sometimes a pinkish hue, but most frequently a brick-red or reddish yellow. We can say nothing of the period at which this body disap¬ pears from the ovary of the cow, in consequence of the animals being killed for the market, and little being known of their his¬ tory ; and it is always necessary to sift to the bottom whatever infor¬ mation we obtain, before any reliance can be placed upon it. yievo oili do. ohscri ax nxuioos fi nodw bus sill lo eguru §. II.—Observations on the Corpus Luteum of the Ewe. The ewe is one of the most readily accessible of all our do¬ mestic quadrupeds, for the purposes of experimental inquiry on the formation of the corpus luteum and development of the em¬ bryo. It goes four months with young, producing one, two, or more, rarely three and four, at a birth. We find that, in consequence of the ease with which this ani¬ mal can be procured for experiments of the kind, many of the an¬ cient authors founded their doctrines on the examination of no other animal but itself; and we have many elaborate series of ex¬ periments, as concerns not only the corpus luteum, but also the evolution^ of the embryo, by Haller, Kuhleman, &c.; and in our own day by M. Coste and others. We have also directed our attention, in an especial manner, to the appearances of the cor¬ pus luteum in this animal; and we have had abundant opportu¬ nities of studying those appearances throughout almost every stage of pregnancy, from one or two days after impregnation, up to the full period of pregnancy, having twice examined the uterus and appendages of ewes killed for the market, in whom the lamb was taken out of the uterus alive, and lived afterwards. Appearance of the Corpus Luteum at different periods of Preg¬ nancy.—It would appear from the observations of different experi¬ menters, that the Graafian vesicle of the ewe is not regular as to the period after conception^ at which rupture takes place. Haller* found the vesicle ruptured in one instance so soon as ninety mi¬ nutes after conception, and always after two hours. Kuhleman may also be mentioned as testifying the same thing. It is rather re¬ markable, however, that the vesicle in the sheep should burst so soon, seeing that in other animals, as the bitch, rabbit, &c. the interval between conception and rupture of the vesicle i§ much greatejr/sf) Is-iineo on kinififi aid! m«T9?9Wod In the ewe, the formation of the corpus luteum does not ap-
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