Threatened miscarriage generally requires bed rest for about a week. A threatened miscarriage isn't an inevitable or natural miscarriage and may not necessarily result in the loss of the pregnancy. If the bleeding is minor and timely measures are taken to preserve the pregnancy, most cases won't progress to inevitable miscarriage. However, if measures to preserve the pregnancy are unsuccessful and not taken promptly, and if the bleeding is heavy and abdominal pain severe from the start, it will generally result in a miscarriage naturally within one to three days. During the treatment to preserve the pregnancy, it is crucial for the patient to rest in bed as much as possible, minimize physical activity to reduce the chances of miscarriage, and strictly avoid sexual activity to reduce stimulation to the uterus and fetus. Dietary nutrition should be increased, including more proteins, vitamin-rich foods, and high-fiber foods. It is important to actively prevent constipation, avoid spicy and stimulating foods, as well as cold, greasy foods, and maintain stable emotions.