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
Mirena releases ____ of LNG per day.
assistant
The correct answer is  Mirena contains a total of 52 mg levonorgestrel (LNG). LNG is released into the uterine cavity at a rate of approximately 20 microgram/day. The LNG IUD is about as effective as sterilization, but, unlike sterilization, it is easily reversible. These devices act mainly by local progestogenic effects and act for up to 5 years.