Same Day Oral EC and Implant Initiation

Inclusion Criteria: * Healthy women * Age 18-35 years * Fluent in English and/or Spanish * BMI \< 30 kg/m2 * No known contraindication to either the ENG contraceptive implant or oral LNG EC using the CDC Medical Eligibility Criteria for Contraceptive Use 2016 * Negative urine pregnancy test * Willing to abstain from further UPI in the 7 days following insertion * Know the date of their last menstrual period * Regular menstrual cycle (24-35 days) * Be willing to comply with the study requirements * Desiring to avoid pregnancy for at least 12 months Exclusion Criteria: * Current pregnancy or breastfeeding * Previous use of oral EC in the current cycle * Report of UPI beyond 5 days in current cycle * Vaginal bleeding of unknown etiology * Allergy to LNG or ENG, IUD or implant in-place * History of permanent contraception through sterilization or hysterectomy * Monogamous partner with a vasectomy * Depo-provera injection within past 15 weeks