FERTILIZATION AND CLEAVAGE 



83 



Litter Size and Fertility 



TABLE XIV 



IN Timed Matings of Rabbit Does. (From 

 Hammond, 1934) 



No. OF 



Matings 



Matings at 



Hours 



after 



Sterile 



Coitus 



Hours 



before ( + ) 



or after (— ) 



Ovulation 



Average 



Litter 



Size 



Matings 

 Fertile, 

 Per Cent 



No. OF YOUNQ 



PER Mating 

 Made 



(a) All strains together (52 different does used) 



(b) C strain (17 different does used) 



(c) E strain (21 different does used) 



(d) F strain (14 different does used) 



