Pregnancy day 17 should mean 17 days of intercourse, when it can generally be detected by early pregnancy test paper and blood HCG. At this time, the fertilized egg has completed its implantation and gradually developed into a gestational sac. The HCG in the blood and urine of the pregnant woman has started to gradually increase and can be detected. If the results of blood and urine tests are positive, it indicates possible pregnancy, but there will be false positives on the early pregnancy test paper, and the diagnosis needs to be confirmed by ultrasound examination in the hospital. An ultrasound can be performed at the hospital after 10 days to clarify if the pregnancy is intrauterine and to rule out ectopic pregnancy and trophoblastic disease. When using the test strips at home, it is important to pay attention to the normal way of using them. Usually it is to use morning urine, urinate in a clean container, insert the MAX end of the test strip into the urine, take it out after 5 seconds and read the value within 1-5 minutes, if it is two bars, it indicates a positive result, indicating a possible pregnancy.