Cùng học ngoại ngữ: O

oxycephaly: (tật) đầu nhọn; đầu hình tháp (cũng gọi là acrocephalia; acrocephaly; hypsicephaly; hypsocephaly; oxycephalia; steeple skull; tower...

Ovulation Calendar Getting pregnant isn't always as easy as falling off a log. Whether you've been trying to get pregnant for a while or are...

Overactive Bladder Incontinence & OAB Overview Stress incontinence and overactive bladder (OAB) are the main causes of incontinence. Stress...

Ovarian Cancer Overview & Facts The American Cancer Society predicts 20,180 new cases of ovarian cancer in the U.S. in 2006. Learn about ovarian...

Osteoporosis Osteoporosis, or thinning bones, is a serious condition that can result in tremendous pain with fractures. Risk factors for...

Arthritis is a general term that means inflammation of the joints. Osteoarthritis, also called degenerative joint disease, is the most common type...

Organ Donation and Transplant At this moment, more than 100,000 people in the U.S. are waiting for an organ. Four thousand more people are added...

To Buy or Not to Buy OrganicOrganic food was once only available at health food stores, marketed to consumers willing to pay extra for natural,...

Want to Improve Your Smile? See what braces, crowns, veneers, teeth whitening, bridges, implants, gum reshaping -- or even a complete dental...

Oral Health Oral Health Overview Teeth and gums reveal the inside story of your overall health -- from signs of diabetes to heart disease to...

Obstructive Sleep Apnea Obstructive sleep apnea is a common and serious disorder in which breathing repeatedly stops for 10 seconds or...

Obesity What is obesity? Being obese means having so much body fat that your health is in danger. Having too much body fat can lead...