Eating a healthy diet is essential for people of every age. But as you age, doing so is especially important. To assess how much you know about good nutrition, take this quiz.

BMI, or body mass index, uses weight and height to calculate weight status for adults. BMI for children and teens also takes into account gender and age because healthy body fatness differs between boys and girls and changes as they grow. This BMI calculator will help you determine if your child is at a healthy weight.

This short assessment will help you find out if you have major risk factors for ovarian cancer.

Although used less commonly than knee or hip replacement, shoulder replacement surgery removes diseased or damaged bone in the shoulder and replaces it with an artificial joint. If arthritis pain is unrelieved by other methods, you may need replacement surgery. Learn how the shoulder works and what to expect in replacement surgery.

We're living longer these days. Unfortunately, a longer life doesn't necessarily mean a healthier one. Many Americans are struggling with chronic health conditions—and even more of us will in the future. Case in point: heart failure.