There is no clear rule on whether it is better to do ultrasound or color ultrasound in the early stage of pregnancy. The purpose of the two examinations is different, and pregnant women can choose according to the purpose of the examination, and there is no such thing as which one is better. B ultrasound and color ultrasound are both ultrasound examination items, most of the cases in the early stages of pregnancy is to carry out B ultrasound examination, can clarify the growth and development of the embryo as well as the location of the bed. Ultrasound can clarify the presence of the gestational sac, buds, fetal heart and the location of the bed. Color ultrasound is a diagnostic technique using the Doppler principle on the basis of ultrasound, which can check the blood flow of the fetus. With the gradual growth and development of the fetus, color ultrasound can check the heart of the fetus, and make clear whether there are mitral valve defects or tricuspid valve defects in the fetal heart. The examination can be performed under the guidance of a doctor in the early stages of pregnancy. If you feel unwell during pregnancy, you should go to the hospital in time.