Two-dimensional color Doppler ultrasound mainly examines the differential diagnosis of gynecological benign and malignant tumors, the evaluation of umbilical cord diseases, fetal congenital heart disease, placental function, and fetal development, and the price is also the cheapest. Usually around one hundred.

Three-dimensional color Doppler ultrasound adds coronal images on the basis of retaining two-dimensional images, which is dynamic and intuitive; It can dynamically observe the activities of fetal head, body surface and internal organs in real time, with clear, accurate and reliable images, rotation function and multi-directional observation; It has the function of 360-degree rotation from front to back, left to right, up and down, and can observe images in different directions in all directions, and can take beautiful photos of the fetus, record the expression changes and burn them into a CD for data preservation as a permanent memorial. It can display the three-dimensional relationship and adjacent relationship of lesions at different levels. The image is stereoscopic and intuitive, and the angle can be adjusted at will. Suspicious structure can be observed through the rotation of three sections, and the abnormality of fetal whole body structure can be seen at a glance, which greatly improves the quality of diagnosis and treatment and reduces misdiagnosis or missed diagnosis. The price is around 200

Four-dimensional color Doppler ultrasound is a complete ultrasound examination system, which can be used for breast imaging, interventional urology and general medical imaging. As a complete set of ultrasound equipment, it can be used for the following research: 1 determination of gestational age, 2 analysis of fetal development, 3 evaluation of multiple or/and high-risk pregnancies, 4 detection of fetal abnormalities, 5 detection of uterine structural abnormalities, 6 detection of placental abnormalities, 7 detection of abnormal bleeding, 8 detection of ectopic pregnancy and other abnormal pregnancies, 9 detection of ovarian tumors and fibromas, and 10 location of placenta.

. The price is between 300 and 400. Five months is too early for color Doppler ultrasound. Four-dimensional color Doppler ultrasound (inexpensive and comprehensive and accurate) is recommended for 22-26 weeks of pregnancy.