Best for unruptured ectopic pregnancy is –
**Core Concept**
Ectopic pregnancy refers to the implantation of a fertilized ovum outside the uterine cavity, often in the fallopian tube. Early detection and management are crucial to prevent life-threatening complications. The best approach for unruptured ectopic pregnancy involves minimally invasive techniques to preserve fertility and reduce morbidity.
**Why the Correct Answer is Right**
The correct answer is **methotrexate administration**. Methotrexate is a folate antagonist that inhibits dihydrofolate reductase, thereby preventing cell division and promoting the degeneration of the ectopic pregnancy. This approach is preferred for unruptured ectopic pregnancies, as it is less invasive than surgery and preserves the fallopian tube. The success of methotrexate administration depends on the size of the ectopic pregnancy, with smaller pregnancies being more amenable to treatment.
**Why Each Wrong Option is Incorrect**
* **Option A:** Surgical intervention may be necessary for ruptured ectopic pregnancies or when medical management fails. However, it is not the best approach for unruptured ectopic pregnancies due to the potential for surgical complications and the loss of the fallopian tube.
* **Option B:** Expectant management is not recommended for unruptured ectopic pregnancies, as it increases the risk of rupture and potential life-threatening bleeding.
* **Option C:** Hysterectomy is a definitive treatment for ectopic pregnancy but is typically reserved for cases where the patient has completed childbearing or has a contraindication to medical or surgical management.
**Clinical Pearl / High-Yield Fact**
Methotrexate administration for unruptured ectopic pregnancy should be considered if the pregnancy is less than 4 cm in diameter and the patient has no contraindications to the medication.
**Correct Answer: A. Methotrexate administration**