In cases of threatened miscarriage, whether to continue the pregnancy depends on the specific situation of the pregnant woman and the embryo inside the womb. If the vaginal bleeding is relatively minor, there is no severe abdominal pain, and an ultrasound shows that the embryo is still alive, then it is possible to continue with medication to maintain the pregnancy. However, if the symptoms of threatened miscarriage are severe after it occurs, and ultrasounds show abnormal embryo development, along with a continuous decline in human chorionic gonadotropin levels, these conditions indicate that miscarriage is inevitable, and it is generally not recommended to continue trying to maintain the pregnancy.