Advantages:

Non-invasive: Obstetric ultrasound is a non-invasive imaging technique that does not require any incisions or injections, making it safe for both the mother and the developing fetus.

Safe: Ultrasound imaging uses high-frequency sound waves that are considered safe for both the mother and the fetus, with no known harmful effects.

Early detection of abnormalities: Obstetric ultrasound can detect certain birth defects and abnormalities early in pregnancy, allowing for early diagnosis and treatment.

Real-time monitoring: 4D ultrasound machines provide real-time monitoring of the fetus, allowing doctors to observe fetal movement and behavior.

Accurate measurements: Ultrasound can provide accurate measurements of the fetus's size, growth, and development, which is important for assessing the health of the fetus and planning for delivery.

Applications:

Confirm pregnancy: Obstetric ultrasound is used to confirm the presence of a viable pregnancy, including determining the number of fetuses and the gestational age.

Monitor fetal growth and development: Ultrasound can monitor fetal growth and development, providing doctors with important information about the fetus's health and development.

Detect abnormalities and birth defects: Obstetric ultrasound can detect certain birth defects and abnormalities, including neural tube defects, heart defects, and abdominal wall defects.

Assess placenta and amniotic fluid: Ultrasound can assess the health of the placenta and the amount of amniotic fluid, which is important for monitoring fetal well-being.

Guide medical interventions: Obstetric ultrasound can guide medical interventions during pregnancy and delivery, such as the placement of a fetal monitor or the positioning of the baby for delivery.