Breast Cancer Drugs Is Vaginal Estrogen Safe? Experts Raise Pros, Cons February 27, 2016 bcsurgery Leave a comment Experts Discuss Pros/Cons of Vaginal Estrogen Friday Feedback: How Safe Is Vaginal Estrogen for Breast Cancer Survivors? ACOG endorsed its use, but what do experts think? http://www.medpagetoday.com/OBGYN/BreastCancer/56449