Ask Dr. Bob: What Is the Prostate?

Do you know what the prostate is? Many people don’t know what it is or what it does. It’s actually a small gland — normally the size and shape of a walnut — that is part of the male reproductive system. It sits at the opening of the bladder and helps make some of the fluid in semen. Men are usually unaware of it, but as they age it starts to grow...