**Question:** MTP is not done in:

A. Abdominal pregnancy
B. Crown-rump length measurement
C. Amniocentesis
D. Immature gestation

**Core Concept:** MTP (Midtrimester Abortion) is a procedure used to terminate a pregnancy during the second trimester (12-28 weeks gestation). It involves dilation and evacuation of the uterus under general anesthesia.

**Why the Correct Answer is Right:** The correct answer is **D. Immature gestation**, as MTP is typically performed for pregnancies in the second trimester, where the fetus is considered mature enough to sustain life outside the womb. In immature gestation, the fetus is not fully developed, and thus, MTP is contraindicated due to the risk of severe complications and potential harm to the developing fetus.

**Why Each Wrong Option is Incorrect:**

A. **Abdominal pregnancy:** MTP is not performed in abdominal pregnancies, as these pregnancies are ectopic and require a different approach.

B. **Crown-rump length measurement:** This is used for dating the gestational age of a pregnancy, not a contraindication for MTP.

C. **Amniocentesis:** Amniocentesis is a diagnostic procedure to collect amniotic fluid for testing, not a contraindication for MTP.

**Clinical Pearl:** Ensure to counsel patients accurately about the indications, contraindications, and alternatives to MTP to provide informed consent and avoid potential legal issues. Understanding the gestational age is crucial in determining the appropriateness of MTP.