THE SOURCE OF THE AMNIOTIC AND ALLANTOIC FLUIDS IN MAMMALS. 



93 



TABLE K. 



Distribution of Sugar in Amniotic and Allantoic Fluids. 



Weight of Foetus, Amnio 



tic Fluid. 



Allantoic Fluid. 



grms. Per cen 



-j. of sugar. 



Per cent, of sugar. 



5 



15 



•417 



8 



078 



•5 



10 



058 



•29 



12 



073 



•5 



13 



058 



•34 



35 



08 



•37 



41 



078 



•413 



42 



077 



•27 



80 



083 





270 



263 



• • • 



295 



113 



•415 



328 



240 





370 



123 



•268 



390 



166 



•71 



450 



•21 



• • •' 



480 



17 





512 



•25 



•44 



530 



•31 



... 



550 



■217 





560 



265 



•634 



720 



51 





740 



•161 



•247 



1505 



•347 



... 



1670 



78 



•33 



TABLE L. 



Percentage of Sugar in Amniotic and Allantoic Fluids at Different Stages of Pregnancy. 



Weight of Foetus, i No. of Obser- 

 grms. vations. 



Amniotic Fluid. 

 Per cent. 



No. of Obser- 

 vations. 



Allantoic Fluid. 

 Per cent. 



Below 15 



30 to 100 



100 to 300 



300 to 1000 



Over 1000 



5 



4 



2 



11 



2 



•083 

 •079 

 •188 

 •235 

 •563 



5 

 3 

 1 

 5 

 1 



•409 

 •351 

 •415 

 •477 

 •33 



In the allantoic fluid the amount varies little, being "409 per cent, in the earlier 

 pregnancies, '438 per cent, in the later stages. 



In the amniotic fluid the percentage is at first small — only "083 — and it rises in the 

 later period to '287 — an increase of more than threefold ; but it is always smaller than 

 the percentage in the allantoic, except possibly at the very end of gestation. 



In a cow about the middle of pregnancy the percentage was : — 



Allantoic 

 Amniotic 



L00 per cent. 

 0-277 „ 





