1, test paper test Convenient to buy, after the menstrual period is delayed for 10 days, using morning urine test, the accuracy rate is about 75%. When testing, if the test paper or pen is deteriorated and damaged, incorrect operation, taking drugs containing HCG, it will lead to errors in the test results, and long menstrual cycles need to stop menstruation for 40 before they can be detected. 2.B ultrasound examination The examination data is detailed, after the menstruation is delayed for seven days, the examination needs to hold urine, and the accuracy rate is about 100%. Ultrasound can show a round halo in the uterus, in which a rhythmic fetal heartbeat can also be seen. At the same time, ultrasound can accurately determine the location of the gestational sac, and clearly determine whether the pregnancy is ectopic. 3, blood HCG test The earliest detection time, 8 to 10 days after intercourse, fasting test, the accuracy rate is about 100%. Blood HCG compared to the traditional urine HCG can be more sensitive, more accurate response to whether the pregnancy, and can put the test time in advance. To summarize, test paper test is the most convenient, but the accuracy rate is low; ultrasound is highly accurate and the location of the gestational sac is judged accurately, but it is necessary to delay the menstrual period for 7 days; blood HCG checks the earliest time of pregnancy, and the accuracy rate is high, but it is not as good as the ultrasound can judge the location of the gestational sac.