52 



HYPOPHYSIS->OVARY-> OVIPOSITOR 



II 



corpora lutea. If (b) , on the other hand, one draws a reci- 

 procal curve, by determining the increase in basophil cells, 

 then one is able to compare it with the curve for corpus 

 luteum formation, and observe synchronisation and rhythm. 



hours 



Fig. 46. Ratio between the quantity of basophile pituitary cells and 

 corpora lutea in the 0. and ^ stages after administration of progesterone. 



Fig. 46 shows the curves obtained from an experiment 

 with progesterone. The lower curve shows the growth of the 

 ovipositor, as measured in A.U. (for the definition, vide 



p. 5). The O O curve shows the percentage of corpora 



lutea passing through the a-phase {vide p. 82), and the 



® * curve, the percentage of those in the /3-phase. The 



•^^ — ..:$ curve represents basophil cells. 1 5 minutes after the 

 administration of progesterone the number of basophil cells 

 reached a maximum. Within these 1 5 minutes, therefore, the 

 first extrusion took place. Restitution followed within 2 

 hours. In 2 to 9 hours a second extrusion took place, the 

 maximum number of basophils being attained at 9 hours. 



