Final answer:
Internal fetal monitoring is used in riskier pregnancies needing close observation, such as those with intrauterine growth restriction. Non-invasive methods like ultrasound and MCG are commonly used for routine assessments.
Step-by-step explanation:
Internal fetal monitoring is generally utilized in pregnancies that have complications or risks that require closer observation, such as with intrauterine growth restriction (IUGR), or when there are specific concerns about the fetus's wellbeing during labor and delivery. This type of monitoring involves the insertion of a sensor directly connected to the fetus, which provides real-time data on the baby's heart rate and other vital signs, which are essential for ensuring the baby's health. Non-invasive methods, like ultrasound imaging and magnetocardiography (MCG), are more common for routine fetal assessment due to their non-intrusive nature and ability to visually evaluate fetal growth and detect issues such as cardiac anomalies or other developmental problems without physical contact with the fetus.