HISTORY OF THE CASE 
71 
find that the Fallopian tube was to all appearance normal, but projecting 
from the free margin of the ovary he observed a haemorrhagic mass 
about the size of a walnut, which he diagnosed as an ovarian pregnancy. 
The tube and ovary were removed in the usual way, and the patient 
made an uneventful recovery. The uterus at the time of operation was 
considerably enlarged, soft and globular, and the presence of an intra¬ 
uterine pregnancy was suspected. This surmise proved correct, the 
pregnancy went on to term, and on August 19th, 1904, she was delivered 
of a full-time child. 
The simultaneous occurrence of an intra-uterine and ovarian pregnancy 
is of considerable interest. It will be noticed that labour supervened 
8 days prior to the day anticipated by the ordinary obstetric tables, 
and the cessation of menstruation had probably relation to the uterine 
gestation. If 28 days be counted from the 20th of November we 
reach the 18 th of December as the day from which the duration of 
pregnancy is calculated according to His’ rule. The first symptoms 
of the extra-uterine pregnancy set in on January 1st, and the final 
rupture came on January 8th. If we assume that fertilization of both 
ova took place as the result of the same insemination, the age of the 
ovarian pregnancy may be anything between 14 and 22 days according 
to His’ convention. The stage of development of the chorionic vesicle and 
embryonic rudiment points to the age as being (still according to the 
convention) from 12 to 15 days, so that we must assume that growth and 
differentiation ceased on the occurrence of rupture of the implantation 
sac and commencement of haemorrhage from the ovary on January 1st. 
If this were not the case we must conclude, either that the ovarian 
ovum was fertilized later than the uterine, or that development was 
retarded owing to the site of implantation. 
Dr. Munro Kerr, having taken special care in removing the parts to 
avoid injuring the specimen, placed it in formalin immediately after the 
operation, and took it to the Pathological Department of the University 
where Professor Muir sliced the ovary longitudinally from the free 
margin to the liilum. The specimen was then placed in the hands of 
Dr. Teacher, who made a sketch of it to scale while it was still in the fresh 
