Sui generis
Sui generis (; ) is a Latin phrase that means "of its (his, her, their) own kind; in a class by itself; unique."
Surrogacy
Traditional surrogacy (also known as partial, genetic, natural or straight surrogacy) involves natural or artificial insemination of a surrogate. If the intended father's sperm is used in the insemination, then the resulting child is genetically related to the intended father and genetically related to the surrogate. If donor sperm is used, the resulting child is not genetically related to either intended parent but is genetically related to the surrogate.