The fetus in the eleventh week of pregnancy is generally not yet stable, and is normally not considered stable until after the twelfth week of pregnancy. The eleventh week of pregnancy belongs to the early stage of pregnancy, although the placenta has now been initially formed, but the adhesion between the placenta and the uterine wall is not yet close enough, and may due to the influence of their own and external factors, the preterm miscarriage may occur. It is only in the middle of pregnancy that the adhesion between the placenta and the uterine wall becomes relatively tight, that is, after twelve weeks of pregnancy. In early pregnancy, you should rest more, avoid strenuous exercise, and prohibit coitus to reduce the stimulation of the fetus. At the same time, you should ensure adequate sleep and maintain a relaxed mood. Enhance nutritional intake, eat more fresh fruits and vegetables and lean meat to ensure a balanced diet and promote fetal growth and development. Try to avoid contact with toxic and harmful substances, so as not to affect the health of the fetus. During pregnancy, pay attention to more rest, at the same time, should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.