Mammals appear to have the ability to select the gender of their offspring to maximize their number of grandchildren, according to a new study that followed three generations of more than 2,300 animals from the San Diego Zoo.
It is not a conscious choice, but in some way, a female’s biology has the capability to assess her health, the quality of her mate, and her environment to determine which sex to go with, according to study author and Stanford evolutionary biologist Joseph P. Garner.
