Which characteristic is NOT assessed when evaluating fetal well-being through contractions?

When evaluating fetal well-being through contractions, the focus is primarily on how contractions relate to fetal health and the labor process. Frequency, duration, and intensity are all critical characteristics that provide important information about the contractions during labor. They help in determining how often the contractions occur, how long they last, and how strong they are, all of which can affect fetal oxygenation and overall well-being.

In contrast, size is not a characteristic that is typically assessed in this context. Evaluating the size of the fetus does not directly pertain to the dynamics of contractions or their implications for fetal health during labor. Instead, it pertains to the overall growth and development of the fetus, which is assessed through different methods, such as ultrasound measurements, rather than through the evaluation of contractions themselves. Therefore, size stands out as the characteristic that is unrelated to the assessment of contractions and their impact on fetal well-being.