This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
In a woman on subdermal progesterone implant, the menstrual abnormality seen is: 
Select and explain. 
A. Menorrhagia, B. Metrorrhagia, C. Polymenorrhea, D. Amenorrhea
B: Metrorrhagia
Answer: B: Metrorrhagia 
Explanation: In progesterone only contraceptives whether injections/IUCDs/implants, the most common problem is–irregular vaginal bleeding i.e metrorrhagia
Subdermal progesterone implants include: