(HealthDay News) -- Researchers have uncovered a genetic link between obesity and the risk for colon cancer. The discovery could lead to greater accuracy in predicting who is at risk for the disease, experts say.

Research has suggested that colon cancer risk rises with increasing weight, but this finding points to a genetic reason for the link.

THURSDAY, July 17 (HealthDay News) -- New research shows that some parents of autistic children appear to be "socially aloof," providing more evidence that some aspects of autism are hereditary.

(HealthDay News) -- Osteoporosis -- caused when the body can't replace bone calcium as fast as it is lost -- is common as people age, particularly among women.

More than 1.5 million Americans each year sustain a bone fracture related to osteoporosis.

Here are common risk factors for osteoporosis, courtesy of the American Academy of Orthopaedic Surgeons:

* Getting older.
* Not doing enough weight-bearing exercises.
* Insufficient estrogen levels after menopause.
* Not getting enough calcium or vitamin D in your diet.
* Certain hormonal imbalances.