Nepotism among rhesus monkey brothers.
D000818:Animals; D004971:Estrus; D005260:Female; D008251:Macaca / Q000502:physiology*; D008253:Macaca mulatta / Q000502:physiology*; D008297:Male; D011247:Pregnancy; D012726:Sexual Behavior, Animal; D012741:Sexual Maturation; D012801:Sibling Relations