Ulipristal Acetate for Cervical Preparation

Inclusion Criteria: * Female, aged 18 years or older * Singleton, viable intrauterine pregnancy between 16 to 18 6/7 weeks of gestation (by ultrasound dating performed prior to or same day of enrollment visit) * Consented for an induced, elective abortion * English-speaking * Able to consent for research project * Willingness to comply with study procedures Exclusion Criteria: * Inability to give informed consent * Contraindications to surgical abortion under moderate sedation * Allergy or previous unacceptable side effect from study medications * Multiple gestation * Intrauterine fetal demise or spontaneous abortion * Rupture of membranes * Current cervical insufficiency * History of liver disease * Taken a CYP3A4 inhibitor within 5 elimination half-lives of the drug from the procedure * Pre-dosing abnormal liver function tests * Patients at increased risk of hepatitis based on a history of any of the following: * Any history of underlying liver disorder, including hepatitis * A family history of hepatitis or currently living with a person who has been given a diagnosis of hepatitis * A history of or currently working as a sex worker * A history of or currently using IV drugs * A self-reported history of alcoholic dependency or abuse