CYCLIC CHANGES IN UTERUS AND OVARIES. 27 



enough. In the left ovary, there were three new corpora lutea 

 present, an ovulation having taken place approximately four 

 to five days previously (thirteen to fourteen days after copula- 

 tion). The uterus showed low cuboidal or low cylindrical surface 

 epithelium with a few mitoses at some places, glands with 

 cuboidal-cylindrical, not very high cells, without mitoses, fibrillar 

 connective tissue in the mucosa without mitoses, with exception 

 of one place where evidently the ovum had fixed itself and called 

 forth the development of a small decidua with mitotic divisions 

 in the small decidual cells. The typical cyclic changes of the 

 uterus are therefore absent. 



(n) No. 967. Three days, three and a half hours after copu- 

 lation, excise two corpora lutea in the left and three corpora 

 lutea in the right ovary. Examination fifteen days later showed 

 one embryo and placenta in the right horn of the uterus. The 

 left horn appeared thickened. In one ovary we found one, in 

 the other three corpora lutea; their cavity is filled with con- 

 nective tissue. There are already large good follicles formed, 

 but no granulosa degeneration has as yet taken place. New 

 ovulation occurred about six days previously (twelve and a half 

 days after copulation). The uterus showed at various places 

 the typical structure of the pregnant uterus without formation 

 of a cell-layer. Cyclic changes did not take place in the uterus 

 during pregnancy. 



(12) No. 968. Three days, thirteen hours and a half after 

 copulation excise three corpora lutea in the left and one corpus 

 luteum in the right ovary. Examination eighteen and a half 

 days after copulation showed three pregnancies in the right and 

 one small one in the upper part of the left horn. In one ovary 

 two new corpora lutea had been formed about seven or eight 

 days previously (ten to eleven days after the previous copula- 

 tion). The mucosa of the uterus presented the typical picture 

 of a pregnant uterus. 



(13) No. 866. Seven days after copulation excise several 

 corpora lutea both in the left and right ovary. Examination 

 eleven days later, Abortion was in progress in both horns of 

 the uterus. A new ovulation had taken place in one of the 

 ovaries about two to three days previously. The cavity of the 



