Normally, a woman’s urine pregnancy test changes from weakly positive to strongly positive after pregnancy only one day apart, which means that the test is weakly positive and the urine pregnancy test should become strongly positive when tested again with morning urine the next day. If the test is continuously weakly positive, it is possible that the embryo is underdeveloped and there is a possibility of biochemical pregnancy or ectopic pregnancy. In this case, further blood tests for chorionic gonadotropin and progesterone are needed to observe the activity of the developing embryo and to monitor the changes dynamically, and if necessary, an ultrasound is needed to determine whether the pregnancy is intrauterine or ectopic. If the urine pregnancy test becomes positive every other day after pregnancy, it means that the embryo should be developing well and the possibility of intrauterine pregnancy is higher. However, it is not certain whether the pregnancy is intrauterine or ectopic and further tests are needed to determine this.