The first month of pregnancy, bleeding from the lower part of the body may be the occurrence of preeclampsia, you should go to the hospital in a timely manner, dynamic monitoring of human chorionic gonadotropin, also known as blood HCG, but also to test the level of progesterone, the uterine adnexal ultrasound to check the position of the embryo in the uterus, the growth of the development of the situation, etc., based on the results of the examination and then decide whether it is necessary to further use of medication to protect the fetus treatment. During the bleeding period, you should pay attention to the hygiene of the perineum, try to rest in bed and avoid unnecessary movement. The first trimester of pregnancy due to embryonic development is not yet very stable, in addition to their own chromosomal abnormalities can lead to the occurrence of miscarriage, but also susceptible to a variety of external and internal factors, prohibit sex and heavy physical labor, but also can not smoke, alcoholism, contact with poisonous, harmful, radioactive substances.