Pilot Study of Femring Estrogen Supplementation During Depo-Provera Initiation

"Estrogen vaginal ring (100 mcg) placed for the first 90 days of Depo-Provera use.~Femring® (estradiol acetate vaginal ring) is a flexible off-white ring designed for vaginal insertion with measurements that include an outer diameter of 56 mm, cross-sectional diameter of 7.6 mm, and core diameter of 2 mm. Femring® 0.1 mg/day has a central core containing 24.8 mg of estradiol acetate which releases at a rate equivalent to 0.1 mg of estradiol per day for 3 months."

Medroxyprogesterone intramuscular injection comes as a suspension (liquid) to be injected into the buttocks or upper arm. It is usually given once every 3 months (13 weeks), and the recommended dose is 150 mg.