The small amount of bleeding in the 5th week of pregnancy may be caused by pre-eclampsia, ectopic pregnancy, etc. It is recommended to go to the hospital, perform ultrasound examination and carry out treatment, not to blindly keep the baby, clinically need to choose the appropriate treatment measures according to the cause. 1, pre-eclampsia: a small amount of bleeding in the 5th week of pregnancy, paroxysmal lower abdominal pain or low back pain, may be caused by pre-eclampsia, it is recommended to go to the hospital in time to do ultrasound examination, blood HCG test and progesterone test. If the progesterone is low and the HCG growth rate is unsatisfactory, you can take progesterone supplementation for fetal preservation treatment under the guidance of doctor. Also pay attention to bed rest and avoid strenuous activities. If vaginal bleeding stops and ultrasound examination indicates that the embryo is alive, the pregnancy can be continued; if the symptoms worsen and miscarriage is inevitable, the pregnancy needs to be terminated in time; 2. Ectopic pregnancy: a small amount of bleeding with abdominal pain at 5 weeks of pregnancy may be caused by ectopic pregnancy. Ectopic pregnancy can cause bleeding and endanger life, so you should seek medical attention and perform gynecological ultrasound to clarify whether the pregnancy is ectopic or not, and you should not keep the fetus, but terminate the pregnancy in time through medicine or surgery.