If two bars are detected with an ovulation test, it means that the woman is ovulating and therefore is not pregnant. However, if you arrange to have sex without contraception at this time, the possibility of pregnancy increases. However, if two bars are detected by pregnancy test or early pregnancy test paper but no pregnancy, it may be due to improper operation method, quality problem of pregnancy test or early pregnancy test paper, biochemical pregnancy, drugs and disease factors, which need to be combined with the specific situation to determine the cause. 1. False positive: improper operation method, quality problem of pregnancy test or early pregnancy test paper, etc. may produce false positive test result, i.e. two bars are detected but no pregnancy. Patients can avoid such things by changing the test paper or using the test paper for several times to detect pregnancy. It is recommended that pregnant women with regular menstrual cycles can determine whether they are pregnant through timely ultrasound examinations; 2. biochemical pregnancy: pregnancy that has not conceived, which may appear as two bars on the test paper or pregnancy test, but after normal menstruation, it will show no pregnancy. If the pregnancy occurs more than twice in a row, it is recommended to consult a doctor for relevant examinations to clarify whether there are problems with the quality of sperm and eggs and the endometrium of the female uterus, and to confirm whether the body is back to normal through ultrasound and monitoring of blood HCG levels. If a pregnant woman has recently taken the above drugs, it is recommended that she can take multiple pregnancy tests and test strips or seek medical attention for blood HCG level testing and ultrasound examination; 4. It is common to see gravida and choriocarcinoma. If you find two bars but not pregnant, after excluding the quality of pregnancy test or early pregnancy test paper or the wrong operation method, it is recommended to actively seek medical advice to clarify the health condition.