“…Some explanations for placement success include procedure-related factors such as an in-patient setting, 16,21 a shorter procedure time, 3 greater provider experience, 3,5 and various types of medications and medication procedures. 3,5,7,21,22,29,38,47 Placement success associated with patient-related factors include prior use of an intrauterine device (IUD), 13 a history of sexually transmitted infections (STIs), 33 a lower body mass index (BMI), 11 and follicular phase of the menstrual cycle. 8,11,22 To date, there are no systematic analyses of variables associated with placement rates.…”