Black women give birth to fully developed babies a full week earlier than white women.
https://academic.oup.com/ije/article/33/1/107/668109Homogeneous military units have less desertion than diverse units.
http://www.nber.org/papers/w8627Genetic diversity causes societal conflict.
https://www.nber.org/papers/w2107990% of women who have a child with a Black man never marry the father.
98% of White women who have children with Black men are not financially supported by the father.
97% of Black fathers who have children with White women are not active in their children’s lives.
White-Black couples have more partner violence than White couples and as much violence as Black couples.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3611980/Mixed race black and white couples face higher odds of prematurity and low birth weight, which appear to contribute to the substantially higher demonstrated risk for stillbirth.
http://archive.is/gyKM6Adolescents who identify themselves as mixed race are at higher health and behavior risk than those of 1 race.
http://archive.is/hbpsVBiracial Asian Americans are twice as likely as monoracial Asian Americans to be diagnosed with a psychological disorder.
http://archive.is/nKEF01/3 of hapas (white+asian) suffer from mental illness
https://www.ucdavis.edu/news/biracial-asian-americans-and-mental-health?id=8732Most congenital problems are more common on mixed-race babies:
https://www.ncbi.nlm.nih.gov/pubmed/15390318 
