Three weeks pregnant hcg value does not double may be good later, but the probability is not large, three weeks pregnant hcg value does not double later need to do a good job of labor and delivery. Three weeks pregnant hcg value does not double, may be the beginning of pregnancy reasons, the embryo growth rate is relatively slow, sometimes appear hcg value doubled poor situation, this situation is mostly normal. But with the prolongation of pregnancy time, the embryo hcg value rises rapidly, the later will appear hcg value doubling situation. However, three weeks pregnant hcg value does not double should also be considered ectopic pregnancy, preeclampsia, fetal arrest and other abnormalities, if these factors lead to the late hcg value value will not have too much change. It is recommended that when the hcg value does not double in three weeks of pregnancy, monitoring should be emphasized in the later stage, and it is recommended that pregnant women need to go to the hospital to do a good job of maternity examination.