THE EFFECT OF PROGESTERONE 



AND LACTOGENIC HORMONE UPON 



PROLONGATION OF PREGNANCY 



IN THE LACTATING MOUSE 



By 

 KAISA TURPEINEN 



» 



From the 



DEPARTMENT OF EMBRYOLOGY, CARNEGIE INSTITUTION OF 



WASHINGTON, BALTIMORE, AND THE WOMEN's CLINIC 



UNIVERSITY OF HELSINKI, HELSINKI, FINLAND 



