. The physiology of reproduction. Reproduction. 324 THE PHYSIOLOGY OF REPRODUCTION Tlie successfully transplanted ovaries exhibited all the characteristic histological features of normal ovarian tissue, excepting that the germinal epithehum was invariably absorbed after the lapse of a short interval. In some cases a certain, amount of degenerative change took place, only certain ele- ments of the tissue being recog- nisable after the lapse of several months ; thus, the stroma might present its normal appearance while the folhcles had disap- peared, or the greater, part of the graft might be co
. The physiology of reproduction. Reproduction. 324 THE PHYSIOLOGY OF REPRODUCTION Tlie successfully transplanted ovaries exhibited all the characteristic histological features of normal ovarian tissue, excepting that the germinal epithehum was invariably absorbed after the lapse of a short interval. In some cases a certain, amount of degenerative change took place, only certain ele- ments of the tissue being recog- nisable after the lapse of several months ; thus, the stroma might present its normal appearance while the folhcles had disap- peared, or the greater, part of the graft might be composed of luteal tissue alone. It was also observed that the successfully. transplanted ovaries underwent the same cychcal changes as normal ovaries. Thus, in animals" killed shortly before the com- mencement of the breeding season, large folhcles were found in the grafts, while at a later period corpora lutea were present, showing that ovulation had occurred in the transplanted ovaries. In one case, a homo- plastic graft was found to be normal after fourteen months, while a normal heteroplastic graft was composed entirely of healthy ovarian tissue (with folhcles and ova) after six months. In these experiments the ovaries were grafted into the substance of the kidneys. Homoplastic transplantation was found to be more easily accomphshed than heteroplastic transplantation. This result could hardly be ascribed to increased difficulties in the per- formance of the latter operation, since the technique was identical in each case. Furthermore, our successes in hetero- plastic transplantation were usually obtained in experiments Fig. 72. — Transverse section through uterus of rat after ovariotomy, showing degener- ative changes. (Cf. Figs. 71 and 73. From Marshall and Jolly.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreproduction, bookyea
