Which of the following is NOT a component of the biophysical profile?

In a biophysical profile (BPP), the primary components assess the well-being of the fetus through various physiological parameters. These components typically include fetal tone, amniotic fluid volume, fetal heart rate with activity, and fetal breathing movements.

Fetal tone refers to the presence of specific movements that indicate the presence of neuromuscular function. Amniotic fluid volume is essential as it provides insights regarding fetal kidney function and overall environment. Fetal heart rate with activity assesses the heart rate's response to movement, which is an important indicator of fetal health.

Maternal blood pressure, while crucial in monitoring maternal health and potential pregnancy complications, does not contribute to the assessment of fetal well-being within the context of a biophysical profile. Therefore, it is not considered a component of the BPP. This distinction is critical because the BPP focuses specifically on fetal indicators rather than maternal parameters.