Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) aromatase deficiency ?
    ### Response:
    Aromatase deficiency is a condition characterized by reduced levels of the female sex hormone estrogen and increased levels of the male sex hormone testosterone.  Females with aromatase deficiency have a typical female chromosome pattern (46,XX) but are born with external genitalia that do not appear clearly female or male (ambiguous genitalia).
    