## **Core Concept**
Depot Medroxyprogesterone Acetate (DMPA), also known as the Depo-Provera injection, is a long-acting reversible contraceptive method. It works by releasing the hormone progestin (medroxyprogesterone acetate) into the body to prevent pregnancy. DMPA is administered via injection.

## **Why the Correct Answer is Right**
The correct timing for administering DMPA to avoid conception effectively is every 12 weeks or 3 months. This duration ensures that the progestin levels remain elevated enough to prevent ovulation consistently. DMPA primarily works by inhibiting the secretion of gonadotropins, which in turn prevents follicular maturation and ovulation, thereby preventing pregnancy.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because the typical duration for DMPA injections to maintain contraceptive efficacy is longer than what is suggested here.
- **Option B:** This option suggests a longer interval than the standard recommendation, which could lead to decreased efficacy as progestin levels might drop low enough to allow ovulation.
- **Option D:** Similar to Option B, suggesting an interval that is too long for effective contraception with DMPA.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that DMPA injections should be given every 12 weeks (or 3 months) to maintain their contraceptive efficacy. It's also important to note that DMPA can cause changes in menstrual bleeding patterns, and some individuals may experience amenorrhea (absence of menstruation) after prolonged use.

## **Correct Answer:** . 3 months.