Final answer:
Intrauterine monitoring measures factors such as fetal heart rate, uterine contractions, amniotic fluid volume, and cervical dilation that cannot be measured externally.
Step-by-step explanation:
Intrauterine monitoring measures several factors that cannot be measured externally. One of these factors is fetal heart rate. This is because the fetal heart rate can give important information about the well-being and oxygenation of the fetus. Other factors that are measured internally include uterine contractions, amniotic fluid volume, and cervical dilation. These measurements help healthcare providers assess the progress of labor and monitor the health of the fetus.