242 STUDIES ON PATHOLOGIC OVA. 



Eight of 20 women from the tubal series had borne one child, 4 had borne two, 

 and 3 more than two, thus again more than confirming the statistical findings in 

 the uterine series, which show that 9 of 33 women had borne once and 18 but twice. 

 The parallelism between these statistics is striking indeed, especially if the small 

 numbers be considered; 14 of 23 women, or 60.8 per cent, in the tubal series had 

 aborted but once, as compared to 19 out of 44, or 46.3 per cent, in the uterine series, 

 a fact which again points to the middle rather than to the end of the reproductive 

 life of these women. 



I do not know whether or not hydatiform degeneration in the tube also is 

 relatively more common near the menopause, for I have not been able to obtain 

 data on the relative frequency of tubal pregnancy in the different decades in the 

 reproductive life of women. However, since by far the greater number of pregnan- 

 cies usually occur early in this period, it probably would be safe to assume that most 

 of the tubal pregnancies occur also at this time. Consequently, it might well 

 follow that the ratio of tubal hydatiform degeneration to the number of pregnancies 

 occurring in the later actually might be greater than that in the earlier decades. 



DESCRIPTION OF PLATE. 



PLATE 13. 



FIG. 135. A portion of a rather fibrous decidua. No. 874o. X300. (See Chap. VIII.) 



Fio. 136. Hydatiform villi in section. No. 825. X45. 



FIG. 137. Cross-section of tube and vesicle. No. 1771. X4. 



FIG. 138. Cross-section of same, showing hydatiform villi. X2. 



FIG. 139. Hydatiform villi from same, in section. X45. 



FIG. 140. Hydatiform villi protruding through an incision in the tube wall. No. 2052. X2. 



