If a person who has survived a heart attack is  healthy enough to walk up two flights of stairs without chest pain or gasping for breath, then they are healthy enough to have a love life. A recent study published in the heart association journal Circulation states that sex is safe for most heart patients.

Researchers in California are developing an artificial testicle that produces human sperm as a solution for male infertility.

Scientists previously attempted to create sperm cells before, but only managed to complete three-quarters of the process in the laboratory as they need to recreate the environment found in a man's testicle to complete the process.

Gym buffs will be familiar with post-exercise soreness, which is formally known as delayed onset muscle soreness or "muscle fever." The good news is that it goes away after awhile, and there are a couple of things you can try to ease the pain, starting with:

Officials in Vietnam have reportedly recorded the country's first human bird flu death in nearly two years, with more international cases of the H5N1 virus having recently popped up.

The victims was that on an 18-year-old boy, who died of the disease on Monday after being hospitalized a day earlier. The victim was said to have worked at a duck farm when he fell sick with a high fever and breathing problems. The virus is typically spread from direct contact with infected poultry. The victim's house has been disinfected and those who were in contact with him remain under surveillance.

Most adults worry about how sharp they'll be once they reach old age, but a new study noted in the journal Nature shows that our genes can have an affect.

For the study, researchers analyzed genetic material from about 2,000 people to determine how intelligence changes from childhood to adulthood. Their findings showed that genes accounted for at least 24% of the mental changes that occur across the life cycle.

About 1 in 100 patients who undergo knee replacement surgery and 1 in 200 patients who have hip replacement surgery will develop a blood clot called venous thromboembolism before leaving the hospital, according to a new study.