When choosing between a female or male yorkie puppies for sale, it is important to understand the differences between the two other than the sex. Male Yorkshire Terriers are going to be slightly bigger in size and also could be a little more aggressive than the female. Both female and male terriers have a life expectancy which can be between 12 and fifteen years and females can be less difficult to train.Females should come into heat twice a year, on the other hand male Yorkshire Terriers will develop quicker sexually and show sexual tendencies at an earlier age.Selecting the right sex of dog is important and once you have decided then you will be guaranteed a loving companion forever.