124 



A. St. G. Huggett 



E 



to 



!- 

 I 



y 



Z 

 UJ 



U 

 < 



s! ,0 °- 



NORMALS 



PROGESTERONE 

 —IMPLANTED 



IC 12 !4 16 18 20 22 



RAT FOETAL AGE *. DAYS 



Fig. 7. Daily averages of placental weights in these 

 same experiments. 



// NORMAL 

 •'/ CONTROLS 



12 14 



FOETAL AGE 



DAYS 



Fig. 8. Daily averages [of foetal weights in 

 these experiments. 



