Color ultrasound is divided into vaginal ultrasound and abdominal ultrasound, abdominal ultrasound costs about 130 dollars, vaginal ultrasound costs about 180 dollars. If you are married or sexually active, it is recommended that you have a vaginal ultrasound to get a better idea of the thickness of the lining of the uterus, to see if there are any abnormal echoes in the lining of the uterus, or if the lining of the uterus is unevenly echogenic and can be seen very clearly. For vaginal ultrasound, it is recommended that you empty your bladder before having the test. If you are having an abdominal ultrasound then, you need to urinate urgently before you can do the test. In addition, if you check the thickness of the endometrium, it is recommended that you give the examination before menstruation, so that you can have a clearer understanding of the condition of the endometrium, in addition, if you have vaginitis, you can not do vaginal ultrasound examination.