Which component is NOT part of the Biophysical Profile (BPP)?

The Biophysical Profile (BPP) is a comprehensive assessment that evaluates fetal well-being through a combination of clinical parameters. The BPP typically includes elements such as the Non-Stress Test (NST), fetal breathing movements, fetal body movements, muscle tone, and amniotic fluid volume assessment.

Fetal heart rate variability is not a standalone component of the BPP; it is rather a characteristic assessed during the NST. The NST itself evaluates the fetal heart rate response to movement and can indicate the presence of adequate fetal oxygenation. However, the BPP's focus is broader, incorporating various attributes of fetal health.

In summary, while fetal heart rate variability is an important aspect of prenatal monitoring, it does not constitute a direct component of the Biophysical Profile, making it the correct answer for this question.