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Condition
Many men experience changes in their sexual drive (also known as libido) over the course of their lives. It is normal for sexual interest to wax and wane intermittently. Temporary decreases in libido can be due to changes in relationships, work or family …
Condition
Cystinuria is a relatively rare disease in which people inherit an inability to process an amino acid called cystine. Excess cystine winds up in the urine, where it can lead to the formation of stones in the bladder, kidneys, and ureters. Cystine stones …
Condition
Infertility—the inability to conceive a child after one year or more of unprotected sexual intercourse– affects about 15 percent of couples. Male infertility plays a role in about half these cases. The problem may be a result of low or poor quality sperm …