Preconditioned for Cancer during Infancy
This is an interesting article on cancer risk.
A recent study published in PNAS demonstrated that exposure to oestrogenic hormones during infancy may cause genetically predisposed individuals to develop certain types of cancers later on in life. This study looked specifically at how exposure to DES, an oestrogenic drug that used to be given to women to prevent miscarriages, influenced the development of leiomyoma in female rats that were genetically predisposed to develop these tumors.
It's important to note that the exposure to DES alone did not result in tumor formation. Rats who developed the tumors also had genetic characteristics known to increase cancer susceptibility.