| Glossary list of "U" |
| Uncircumcised |
| Description of a penis that has a foreskin. |
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| Ureters |
| The two tubes that lead from the kidneys to the bladder. |
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| Urethra |
| The tube and opening from which women and men urinate. The urethra empties the bladder and carries urine to the urethral opening. In men, the urethra runs through the penis and also carries ejaculate and pre-ejaculate during sex play. |
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| Use Effectiveness |
| The reliability of a contraceptive method as it is usually used - when it is not always used consistently or correctly. |
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| Uterus |
| The pear-shaped, muscular reproductive organ from which women menstruate and where normal pregnancy develops; the womb. |
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| UTI(Urinary Tract Infection) |
| A bacterial infection of the bladder (also called cystitis), the ureters, or the urethra; can be sexually transmitted. |
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