Could a copper ring replace the pill? small study tests safety

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Biological female * Age \>18 * Premenopausal women * Regular, normal, cyclic menses, with a usual length of 21 to 35 days * Willing to give voluntary consent, sign an informed consent form and comply with study procedures as required by the protocol Exclusion Criteria: * Use of oral contraceptives, Copper-IUD, hormonal-IUD, another intravaginal contraceptive device, or any other method of female birth control within 3 months prior to study enrollment * Postmenopausal * Biological male * Positive urine pregnancy test at screening visit * Use of hormone therapy; injectable within the past 6 months; implantable within the past 3 months; * Presence of a vaginal/cervical/uterine anomaly or a diagnosed pathology that effects the vaginal cavity and may impair the ability to safely insert/remove a vaginal ring. * The presence of certain conditions of relevance to vaginal ring use, such as cervicitis, vaginitis or bleeding cervical erosion; lichen sclerosis, lichen planus or vaginismus; Papanicolau (PAP) grade III-V cervical smear result; prolapse of uterine cervix, cystocele and/or rectocele; severe or chronic constipation, dyspareunia or other coital problems; . * History or current diagnosis of any of the following: * gynecological cancer * fibroids * polycystic ovary syndrome * Past exposure to radiation therapy to the pelvis, or planned radiation therapy to the pelvis during the study; * Current diagnosis of a sexually transmitted disease; * Wilson's Disease; * Known allergy to metal or silicone * Had an abortion or breastfeeding within 2 months before the start of the trial; * Presence of a significant medical condition or health concern that, in the opinion of the investigator, may impact the patient's safety or the study's outcomes; * A condition that, in the opinion of the investigator, precludes the patient from being able to provide informed consent; * Inability or unwillingness to refrain from using a tampon/menstrual cup for the duration of the study. * Known inability to tolerate products/devices in the vagina (i.e., tampons, menstrual cups, vaginal rings, etc.)