If the contractions cause bleeding in early or mid-pregnancy, it is usually a preeclampsia, and the fetus can be preserved through active treatment; if it occurs in the late stage of pregnancy, it may be a preterm labor. If contractions occur in early or mid-pregnancy and cause bleeding, you should consult a doctor in time for fertility preservation treatment, avoiding strenuous exercise and supplementing with progesterone to preserve the fetus, which can usually be preserved. If there is a lot of bleeding, it is possible that the fetus can not be preserved, and then the uterus should be removed in time. If contractions occur in late pregnancy and cause bleeding, it may be a sign that labor is imminent, and you should consult a doctor in time to wait for delivery, so don’t panic and worry too much. If contractions occur and cause bleeding, you should seek medical attention.