The U.S. Food and Drug Administration (FDA) has approved an AIDS drug made by Gilead to treat patients with hepatitis B. The drug Viread has been available in the U.S. as a treatment for HIV infection in adults since 2001.

The FDA is joining regulators in Europe, Turkey, Australia and New Zealand by allowing the drug in U.S. Generically known as tenofovir, the drug is taken in the form of a pill once daily. It works by blocking HBV DNA polymerase, the enzyme that is necessary for the virus to replicate in liver cells

A genetic anomaly found in families with the rare Li-Fraumeni syndrome, may lead to a blood test to detect tumors early.

LFS is a rare hereditary disorder in which the sufferer has greater susceptibility to cancer. It is linked to the mutation of a tumor suppressor gene, which usually helps control cell growth

The finding may improve understanding of how the visual system develops and boost hope for the discovery of gene therapies for eye disorders.

Duane syndrome, which is more prevalent in women and in the left eye, affects about half a million people worldwide. It is a congenital eye movement disorder that causes eye muscles to contract and relax when they should not. The syndrome affects nerve growth in the eyes and cause them to have limited sideways movement

Diabetes and obesity can affect male fertility in a negative way, new research has found. The findings, presented Wednesday at the European Society of Human Reproduction and Embryology conference here, could mean that men need to keep tabs on their weight when planning a family.

Researchers from the University of Aberdeen found that men of average weight have healthier sperm in higher volumes than those outside the normal range. The research follows reports made by doctors earlier this week that male fertility begins to decline when men reach their mid-30s

A new study shows that a man's fertility starts to fall in his mid 30s and it could also be considered a factor in determining the reason for failed conception in couples who are trying to conceive.

Researchers from Paris studied more than 12,000 couples undergoing fertility treatments and the results revealed that pregnancy rates drop and miscarriages increase when the father is older than 40. The findings are being presented Monday at the 24th annual conference of the European Society of Human Reproduction and Embryology in Barcelona, Spain