A portable monitoring ultrasound diagnostic system specifically tailored for gynecological childbirth. With a simple non-invasive, automatic and highly reliable 3D ultrasound scan, the entire process of the fetus from birth to delivery is monitored safely and visually. Provide fast, quantitative and objective results, 20 seconds to achieve automatic and rapid measurement of fetal head position, progress angle, rotation angle and fetal head and perineum distance. Compared with traditional ultrasound and finger examination, it is more accurate and overcomes the dependence on the experience of medical staff. Pregnant women experience optimization, improve the rate of natural delivery. Compact volume and flexible mobility meet the needs of clinical rapid emergency inspection.