Using data from the U.S. Census, Dr. Logan investigated the fertility of Native Americans to find why those with African ancestry had so many children. Dr. Logan shows that a host of factors affected their reproductive success. These included genetics, cultural practices and their socio-economic and health environments.
Dr. Logan examined the reproductive histories of 295 women of mixed Indian-black and Indian-black-white heritage. He found that Indian-black marriages proved to be advantageous in terms of fertility, the average number of births, and offspring survival.
The lower infant-childhood death rates recorded for mixed couples, together with variations in sterility and the number of children by these mixed parents shows why, they as a population grew.
Dr. Logan's study concluded that because mixed-blood Indians with African ancestry did so well reproductively speaks to their ability to make the best lives for themselves and their children. Especially in a highly racist society. Those who
faced so many challenges fared well reproductively despite the hurdles they encountered.