If the menstrual period is delayed for 11 days, you can check out the pregnancy, because clinically, if you are pregnant, it means that in the ovulation period when intercourse, sperm and egg have combined to form a fertilized egg, the fertilized egg to enter the uterine cavity to bed about an average of 15 days or so, so when the menstrual period has been delayed for 11 days, the fertilized egg in the uterus in the bed of the time has been 11 days. So the HCG concentration in the body will reach a certain level, so this time can detect pregnancy, and also recommended that if the clinical detection of pregnancy, then according to the specific situation, choose to do ultrasound time, mainly to understand the size of the current gestational sac and the number of days after menopause whether or not to comply with, and to determine the intrauterine pregnancy.