**Core Concept**
Antenatal screening is a crucial aspect of prenatal care that involves the use of various techniques to detect potential fetal anomalies, infections, or genetic disorders. These screenings often involve the analysis of tissue or fluid samples obtained from the fetus or the mother.

**Why the Correct Answer is Right**
Peripheral lymphocytes are not typically used for antenatal screening. This is because lymphocytes are a type of white blood cell that play a key role in the immune system, and their analysis is not a standard method for detecting fetal anomalies or genetic disorders. In contrast, amniotic fluid, cord blood, and chorionic villi are commonly used for antenatal screening due to their rich content of fetal cells and genetic material.

**Why Each Wrong Option is Incorrect**
**Option A:** Cord blood is actually used for antenatal screening, particularly for the detection of infections such as HIV, syphilis, and Group B streptococcus.
**Option B:** Amniotic fluid is used for antenatal screening, including the analysis of fetal cells and genetic material to detect potential anomalies or genetic disorders.
**Option C:** Chorionic villi are used for antenatal screening, particularly for the detection of chromosomal abnormalities such as Down syndrome.

**Clinical Pearl / High-Yield Fact**
When performing antenatal screening, it is essential to use the appropriate sample type to ensure accurate results. For example, amniotic fluid is typically used for the detection of neural tube defects, while cord blood is used for the detection of infections.

**✓ Correct Answer:** D. Peripheral lymphocytes