Last menstrual period March 31, the next period does not come can be measured pregnancy. The early pregnancy test paper currently on the market detects the HCG level in urine, and a positive test can be detected when the HCG concentration in urine is 25-50 U/L or more. In the case of normal menstruation, counting from the first day of the next menstrual period, counting down 14 days for the day of ovulation, the earliest in the 6th day of the day of ovulation can be detected positive, usually recommended 14 days after the day of ovulation to use early pregnancy test paper, that is, the next time to come to the menstrual period can be measured pregnancy. Morning urine can be used to detect pregnancy, as it has a high concentration of HCG, which improves the accuracy of the test. Early pregnancy test paper accuracy is limited, after a positive test, you also need to go to the hospital to complete the blood HCG, progesterone and ultrasound examination, clear whether the intrauterine live birth. After finding out that you are pregnant, you should have regular checkups to observe the condition of the fetus.