National Toxicology Program

• Primary Uses or Exposures : Steriodal estrogens are a group of structurally related hormones that control sex and growth characteristics and are commonly used in hormone or estrogen replacement therapy to treat symptoms of menopause, and in oral contraceptives.
• Nominated by: NIEHS
• Basis for Nomination: IARC¹ classification as carcinogenic to humans based on sufficient evidence of carcinogenicity in humans
• Current Status: Listed in the RoC as known to be a human carcinogen since the 10th RoC (2002)

¹ International Agency For Research On Cancer (IARC)