Retired Alexandria Police Lieutenant Mark Bergin is revealing how the badge shapes a police officer’s life. His debut novel, “Apprehension,” tells the story of Police Detective John Kelly, a ...

Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

A mean platelet volume (MPV) test measures the average size of your platelets, which are small blood cells that help with blood clotting. Typical MPV levels range from 7 to 13 femtoliters. High MPV ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

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 your ...

No STI test is 100% accurate, so false results can happen. Tests with high sensitivity might still miss some infections. If results are unclear, more testing or treatment may be needed. Sexually ...

You may keep testing positive for COVID-19 even after feeling better for weeks or months. PCR tests are more sensitive and can show a positive result long after you're not contagious. Most people are ...

The exact cause of hip impingement is usually unknown. There are two main types of hip impingement defined by where deformity occurs in the joint: the femoral head or acetabulum. A physical exam, ...

What are some common liver tests? A series of blood tests can often find out if the liver is inflamed, injured, or working normally. These tests can also tell the difference between acute and chronic ...