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Results 1 - 1 of 1 for Abnormal breast physiology
  1. CYP17A1 gene 
    ... and uterus) and secondary sex characteristics, such as breasts and menstrual periods. In chromosomal males (individuals with an X and a Y chromosome), a lack of male sex hormones leads to abnormal development of external genitalia. Depending on the severity ...
    https://medlineplus.gov/genetics/gene/cyp17a1 - Genetics