problems caused by environmental factors, physical damage, psychological issues, autoimmune disorders, or other causes. The best-known functional problems include sexual dysfunction and infertility, which are both broad terms relating to many disorders with many causes. Specific reproductive diseases are often symptoms of other diseases and disorders, or have multiple, or unknown causes making them difficult to classify. Examples of unclassifiable disorders are Peyronie's disease in males and endometriosis in females. Many congenital conditions cause reproductive abnormalities, but are better known for their other symptoms. These include: Turner syndrome, Klinefelter's syndrome, Cystic fibrosis, and Bloom syndrome. References Human anatomy Reproductive system Sexual reproduction