The results of a three-day delayed period with no pregnancy on the test strip are not necessarily accurate at this time. Menstruation has just been postponed for three days, whether the menstrual cycle is normal or abnormal women, at this time the time is still short, early pregnancy test paper can not accurately detect whether the pregnancy. Normal menstruation delayed or early 7 days are normal, you can wait for 7 days and then early pregnancy test. If your period is delayed for three days, you can first take a blood test for human chorionic gonadotropin (HCG), which is an earlier way to detect pregnancy. After the pregnancy is detected, an ultrasound will be performed to check whether the pregnancy is intrauterine or extrauterine, and the development of the fetus.