402 FRANKLIN P. MALL 



follicle. According to J. G. Clark^ this is accompanied by vascu- 

 lar hyperemia of the ovary, and the possibility of a spasm of the 

 ovary is not to be excluded, for there is an abundance of muscle 

 in this organ which no doubt has a function to perform. 



The following histories include all cases from our collection in 

 which the copulation history is given. I have also added the 

 Watt^ case because it is the only one I have been able to find in 

 the literature since the publication of the Manual. I have 

 included all cases because I think it is best not to select those 

 which suit my convenience in making a curve, but to give the 

 poor material together with the good. A few of the records are 

 sufficiently complete to be unimpeachable; the remainder are 

 given for what they are worth. 



No. 1399 



(Dr. H. N. Mateer, Wooster, Ohio.) 



Embryo, GL 1 mm. Chorion 10 x 9 mm. From a hysterectomy. 

 Copulation September 19 and September 27. Operation, October 19. 

 (I have been unable to find out date of last period, but it is probably 

 recorded.) Copulation age 22 or 30 days. If the former is taken, it 

 matches the curve exactly. 



No. 779 



(Dr. , Baltimore.) 



Embryo, GL 2.75 mm. The specimen though otherwise normal 

 was later found to have spina bifida. It came from the physician's 

 wife. She is 37 years old, and is the mother of one child and this is 

 her first abortion. She is very anxious to have children. Last period, 

 August 29 to September 2. Abortion, October 12. Fruitful copula- 

 tion, in the woman's opinion, September 25 and later. She does not 

 state specifically that copulation occurred between September 2 and 

 September 25. Menstrual age, 44 daj^s. Copulation age, 17 days or 

 less. Doubtful case. 



^ Clark, J. G. 1899 The origin, growth and fate of the corpus luteum as 

 observed in the ovary of the pig and man. Johns Hopkins Hospital Reports, 

 vol. 7. 



1900 The origin, development and degeneration of the blood-vessels of the 

 human ovary. Johns Hopkins Hospital Reports, vol. 9. 



^ Watt. J. B. 1915 Description of two twin human embryos with 17 to 19 

 paired somites. Contributions to Embryology, vol. 2, Carnegie Institution of 

 Washington, Publication No. 222. 



