However, there is recognition on the part of some in the medical profession that hormones can cause malignancy if a woman happens to be sensitive to such hormones. For this reason careful supervision of such treatment is advisable if this type of hormone treatment seems necessary.

DES causes abortion. . . . Just how effective it is constitutes part of the current debate over the validity of its use.” And another factor is that daughters born to women taking this synthetic hormone, upon their reaching adulthood, have been reported as having a higher than average risk of genital cancer.