**Question:** IUCD having the longest life span is

A. CuT380A
B. Jadelle
C. ParaGard
D. Nexplanon

**Core Concept:** Intrauterine Contraceptive Devices (IUCDs) are long-acting reversible contraceptives placed within the uterus to prevent pregnancy. They have varying lifespans.

**Why the Correct Answer is Right:** CuT380A (Contraceptive Tubal Ligation 380A) has the longest life span among the given options. CuT380A is a copper-releasing IUCD that inhibits sperm-egg union by acting as a physical barrier, and also releases copper ions to create an unfavorable environment for sperm survival. Its lifespan is typically 10-12 years.

**Why Each Wrong Option is Incorrect:**

B. Jadelle (Norplant-2): This is a levonorgestrel-releasing IUCD with a lifespan of around 5 years.

C. ParaGard: A copper-releasing IUCD with a lifespan of approximately 10 years. However, it is less effective than CuT380A due to the lower copper release rate.

D. Nexplanon (Etonogestrel): A subdermal implant that releases progestin and has a lifespan of 3 years. It is not an IUCD.

**Clinical Pearl:** When selecting an IUCD for a patient, consider factors like patient preference, lifespan, and effectiveness. CuT380A offers the longest lifespan (10-12 years) and high effectiveness, making it the optimal choice in most cases. However, patient preference and individual circumstances can influence the decision.