If there's one celebrity name that pops into my head when I hear the words "stick thin," it's Mary-Kate Olsen. Kate Moss is up there too, but I'm guessing Mary-Kate may be known more for her skinniness than her Full House stardom. Hey, things might ...

If you're a women with a twin brother, your chances of conceiving may be reduced by 25%. According to researchers, this is due to the testosterone female twins are exposed to in the womb. In addition to infertility, there are other interesting side ...

The old saying goes that to have a friend you need to be a friend, but according to this new research, friendship may actually lie in the genes. By comparing the friendships of identical twins (who share identical genes) and fraternal twins (who ...

It's hard to understand when those visiting a hospital are given drug amounts (for whatever reason) that are completely inappropriate for the need at hand. In the case of actor Dennis Quaid and his wife, the couple's recently twins were born and then ...

Photo: Bob and Mike Bryan, provided by BEST Tennis They're the coolest doubles team on the pro tour -- and not just because they've amassed over 50 titles, captured an Olympic medal and won all the Grand Slam ...

Sunlight's getting a lot of press lately, with emerging research that vitamin D is crucial for the prevention of certain diseases. Sun exposure is one of the easiest and most efficient ways to get vitamin D, but because sun exposure also brings with ...

As we fight to stay fit and lean, your bloodline is an ever-present contender in the ring. If your parents are overweight or obese, it can be tough not to walk in their footsteps. A new twin study reveals the power of genetics -- nature beats nurture ...

While Jennifer Lopez was pregnant, there were rumors that she was unhappy with, even embarrassed by, the amount of weight she gained. However, she's now proudly announcing that she put on 50 pounds while carrying her twins, and though she ...