262 ADOLF H. SCHULTZ. 



Auerbach himself assumes that many abortions of the earlier 

 months are concealed. The same author found that of his 

 material 3,635 abortions, or almost half, fell within the first 

 three months of pregnancy, and it is for this very period that the 

 statistics are incomplete; therefore in reality much more than 

 half the number of abortions belong to the first three months. 

 According to Franz 42.6 per cent, and according to Diihrssen 

 even 59 per cent, of abortions occur in the third month alone. 



The sex-ratio of stillborn is much higher than that of living- 

 born. A table taken from Morgan ('13) gives the following sex- 

 ratios of stillborn for European countries: 



Norway 124.6 Denmark 132.0 



Holland 127.1 Belgium 132.0 



Germany 128.3 Austria 132.1 



Hungary 130.0 Switzerland I35-O 



Italy 131.1 Sweden 135.0 



Such high sex-ratios of stillborn as that of Walter (260) or that 

 of Tschuprow (400) are probably based upon relatively limited 

 material and do not represent true ratios. 



Auerbach gives detailed information concerning the sex-ratio 

 of abortions. This author's material is distributed among the 

 different months as follows: 



7th month 402 c? 348 9 sex-ratio 116 



6th " 506 cf 437 9 " " 116 



5th " 645 c? 3969 " " 163 



4th " 928 c? 405 9 " " 229 



4th-7th " 2,4810'' 1,5869 " " 156.4 



For the first three months of pregnancy he assumes that the 

 sex-ratio of abortions is at least equal to that of the fourth month, 

 namely 229. It seems to him more probable, however, that it 

 increases in constant proportion; therefore he estimates 322 for 

 the third month and 452 for the second month. According to 

 Carvallo ('12) the sex-ratio of dead embryos up to the fourth 

 month is 250; this figure he calculated from the statistics of Paris 

 in 1908. Korosy ( '98) found the sex-ratio of 3,781 abortions to be 

 152.4. Pinard and Magnan ('13) report on 1,229 abortions, the 

 age of which is not stated. This material showed a sex-ratio of 



