The best replacement for estring is femring.

The best alternatives to estring are rated as following:
★★★★★  femring
★★★★  vagifem
★  estrace
★  estrace cream
★  premarin cream
  nuvaring
  vagifems
  estrogen cream
  premarin

Your alternative for estring is not listed? Suggest!
Speaking about estring, one probably shouldn't forget about pessary.

Other search terms related to estring and their ratings are:
★★★★★ pessary
You have in mind a companion for estring and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of estring in all years. Click on graph for more.
estring
femring
vagifem