Preference, adherence and acceptability of three non-medicated intravaginal rings of differing external diameters: a randomized, crossover trial.

Background: No empirical data support the 54-58mm external diameter of intravaginal rings (rings) currently available and in development for contraception and other indications. Understanding how external diameter affects preference, adherence, and acceptability is critical for optimizing future product development.

Objectives: Our primary objectives were to determine which of three non-medicated rings of differing external diameters was preferred and yielded the highest adherence.

A comparison of acceptability of contraceptive vaginal rings, pills, and injectables among cisgender women in Kenya and Zimbabwe: protocol for a mixed-methods study.

Background: Expanding contraceptive options could better meet users' diverse needs and preferences. Annovera is a contraceptive vaginal ring that provides a year of pregnancy prevention while remaining under user control and allowing for regular menstrual cycles. This method may also help to reduce burdens on some health care and supply chain systems.