If the test paper does not deepen, the HCG cannot be good. Good HCG means that the HCG will double after 48 hours, because this is the only way to indicate that the baby is developing well in the early stages of pregnancy, otherwise ectopic pregnancy or embryonic arrest should be suspected. Test strips use a woman’s urine to test for human chorionic gonadotropin, which is normally secreted by the trophoblast cells of the embryo. As the baby grows, the hormone level will slowly increase. That’s why HCG doubles after 2 days and the color on the test paper shows darker and darker. If the color of the test paper does not deepen, it means that the level of hormones secreted by the placenta has not increased. On the one hand, we have to consider that it is ectopic pregnancy, and on the other hand, we have to consider that the embryo is not developing well.