In the daily work, we often encounter the following examples: some female friends can easily take a day off, early in the morning to the hospital queue number, and easily wait to do gynecological ultrasound examination, but the ultrasonographer said that the ultrasound examination results are not accurate, suggesting how many days later or after the next menstrual examination, really happy to come, and return to failure! Gynecological ultrasound examination timing: 1, if it is a health checkup (including preconception or premarital examination), it is best to choose within three days after menstruation. 2.If you suspect a cyst in the adnexal area and wish to come to the hospital for review, if there is no special discomfort, it is best to choose within three days after the next menstrual period is clean. 3.If you suspect endometrial polyp and want to come to the hospital for review, preferably within three days after your next menstrual period; if your menstrual flow is incomplete, it is best not to count more than the 10th day from the onset of menstruation. 4.If you suspect uterine abnormality and wish to come to our hospital for review, it is better to choose within one week after ovulation. 5.If you have an early pregnancy and wish to come to our hospital to confirm whether it is an intrauterine pregnancy or whether the embryo is alive, if there is no special discomfort (abdominal pain or vaginal bleeding, etc.), it is better to choose after 7 weeks of pregnancy (gestational age); if you choose transvaginal ultrasound examination, you can choose one week earlier (including those who wish to terminate the pregnancy).