**Core Concept**
The question pertains to the administration schedule of Depot Medroxyprogesterone Acetate (DMPA), a long-acting reversible contraceptive injection. DMPA is a progestin-only contraceptive that is administered every 12 weeks to maintain contraceptive efficacy.

**Why the Correct Answer is Right**
The correct answer is 17 weeks because DMPA has a longer-lasting effect than its 12-week administration interval, allowing for a slightly delayed next injection. The exact duration of contraceptive efficacy is 14 weeks after the last injection, but the next dose can be administered up to 17 weeks after the previous one. This extended window is crucial for women who may experience delays in accessing healthcare services or who have irregular menstrual cycles.

**Why Each Wrong Option is Incorrect**
**Option A:** 12 weeks - This is the standard administration interval for DMPA, but it is not the latest time by which the next injection may be taken.
**Option B:** 13 weeks - While DMPA's contraceptive efficacy lasts beyond 12 weeks, 13 weeks is still too early for the next injection.
**Option C:** 15 weeks - Although DMPA's effect is longer-lasting, 15 weeks is still within the recommended interval for the next injection.

**Clinical Pearl / High-Yield Fact**
It is essential to note that DMPA's contraceptive efficacy can last up to 14 weeks after the last injection, allowing for some flexibility in scheduling. However, it is crucial to adhere to the recommended administration schedule to maintain optimal contraceptive protection.

**✓ Correct Answer: D. 17 weeks**