Temperament Linked To Onset Of Cancer And Early Death In Female Rats

... Female rats that are apprehensive of new experiences as infants maintain that temperament and die earlier from mammary and pituitary tumors than do their more adventuresome sisters, according to new research by a team based at the University of Chicago. The apprehensive rats were more likely to have irregular reproductive cycles than adventuresome rats, and that disruption could account for hormonal differences linked to the development of cancer earlier, the scholars found. ...