1. Common methods of how long it will take to detect pregnancy. How long it will take to detect pregnancy is a question that many expectant mothers are concerned about. At present, the main methods for detecting pregnancy are as follows: 1. Urine test strip method: This is the most common method, which is usually performed after the menstrual cycle is expected to be delayed by 7 days. The test strip will show whether you are pregnant. 2. Blood test: This method can detect pregnancy earlier, but it requires going to the hospital. 3. B-ultrasound examination method: Usually around 6 weeks of pregnancy, the embryo and fetal heartbeat can be seen through B-ultrasound examination. 4. Urine HCG quantification method: this method