http://www.cancer.gov/cancertopics/factsheet/Risk/DES
National Cancer Institute, National Institutes of Health
DES (diethylstilbestrol) is a synthetic form of estrogen, a female hormone. This fact sheet answers questions about DES, including what health problems might DES-exposed daughters, sons, and mothers have; how people can find out if they took DES during pregnancy or were exposed to DES in utero; and more.