What is Estring? Estring vaginal rings contain estradiol. Estradiol (a form of estrogen) is a female sex hormone necessary for many processes in the body. Estring releases estrogen that is absorbed directly through the skin of the vaginal wall., Estring® (estradiol vaginal system) is a soft, flexible ring used after menopause that continuously releases an estrogen over 3 months. Estring is for the treatment of moderate to severe symptoms of vulvar and vaginal atrophy due to menopause., Estring (estradiol) is an estrogen vaginal ring used as part of hormone replacement therapy (HRT) to treat moderate-to-severe menopause symptoms in and around the vagina, such as vaginal dryness, burning, and irritation.The ring is inserted into the vagina and stays in place for 3 months, releasing a steady dose of estrogen directly where it's needed., What is ESTRING? ESTRING (estradiol vaginal system) is an off-white, soft, flexible ring with a center that contains 2 mg of estradiol (an estrogen hormone). ESTRING releases estradiol into the vagina in a consistent, stable manner for 90 days. The soft, flexible ring is placed in the upper third of the vagina (by the physician or the patient)., What are the ingredients in ESTRING? ESTRING (estradiol vaginal system) is a slightly opaque ring with a whitish core containing a drug reservoir of 2 mg estradiol (an estrogen hormone). Estradiol, silicone polymers, barium sulfate and silicone fluid (as dispersing agent) are combined to form the ring. Storage, Find patient medical information for Estradiol vaginal (Estrace, Estring, Vagifem) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings.