This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contraceptives, Subject name: Gynaecology & Obstetrics
Progestase has to be replaced after : 
Select and explain. 
A. 1 year, B. 5 years, C. 3 years, D. 6 months
A: 1 year
Answer: A: 1 year 
Explanation: The US Food and Drug Administration (USFDA)-approved effective life is only 1 year. The contraceptive effectiveness of the progestase is similar to that of Cu IUDs; it reduces menstrual loss but has to be replaced every year.