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1. www.webmd.com › prostate-cancer › psaProstate-Specific Antigen: PSA Test and PSA Levels Explained ...

   www.webmd.com › prostate-cancer › psa

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   2024年4月5日 · What Is Prostate-Specific Antigen? Your prostate is a gland that makes seminal fluid, which nourishes and transports your sperm when you ejaculate. It's about the size of a walnut and surrounds...

2. www.webmd.com › men › what-is-the-average-penis-sizeAverage Penis Size: What Determines It - WebMD

   www.webmd.com › men › what-is-the-average-penis-size

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   2024年6月18日 · If you are wondering what the average penis size is at this age, the answer may surprise you. Most men believe that an average penis measures 15.24 centimeters (6.0 inches) or more when erect ...