Your Boys Are Your Responsibility
Select your breeding females wisely and carefully.
Humans (or Blendingar and even wolves for that matter) are a k-selection species. They invest energy on their offsprings rather than reproduce in relatively huge numbers (relative to r-selected populations). This is in contrast to r-selection species, governed by their biotic potential, and thus, that focus resources on reproducing in exceptionally high numbers, very quickly, with limited or no care for the offsprings. Example of an r-selection species are insects or fishes (capable of producing thousands of larvae/eggs/offsprings quickly and at once).
In contrast, K-selection species have long gestation periods, and slow maturation (and thus extended parental care), long life spans, and tend to inhabitant stable biological communities.
This means that human (and Blendingr) offsprings - both males and females - require exceptionally high focus and resources for their development, over the course of many years, and in a stable environment.