system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The 'morning after pill' contains which of the following?
assistant
The correct answer is  Emergency contraceptive pills (ECPs) are also known as 'the morning after pill', 'interception', 'postcoital contraception' or 'vacation pill', contains levonorgesterol (LNG). Levonorgesterol 0.75 mg in two doses 12 hours apa is specifically developed for emergency contraception. Levonorgesterol is the preferred method over Yuzpe regimen due to its higher efficacy and lesser side effects. Ref: Current Obstetrics & Gynecology By Gita Ganguly Mukherjee, Sudip Chakravay, Bhaskar Pal, et al, Jaypee Brothers, Medical Publishers, 2007, Page 366 ; Shaw, 13th ed, Page 233