At present, with the increased stress of life and the deterioration of the environment, the term indolent abortion is becoming more and more familiar to many pregnant women. Indolent abortion is a common condition of pregnancy and is a special type of spontaneous abortion. Also known as late miscarriage, or commonly referred to as absence of a heartbeat or fetal heartbeat, indolent miscarriage refers to the death of an intrauterine embryo or fetus that is not expelled in time and remains in the uterine cavity, requiring manual intervention to expel the embryo or tissue. Induced miscarriage is generally the death of an embryo before 20 weeks, while the death of an embryo after 20 weeks falls under the category of stillbirth. In early pregnancy, the embryo usually develops a fetal heartbeat at the latest on day 60. If there is no fetal heartbeat by day 60, it is usually considered early pregnancy embryonic abortion. In addition, if there is a fetal heartbeat first and then it disappears later, this kind of embryonic death is classified as midtrimester embryonic abortion. There are many causes of miscarriage, such as chromosomal abnormalities, abnormal internal environment, abnormal internal distribution, abnormal immune function, excessive smoking and drinking, emotional abnormalities and systemic infections. The current common understanding is that about 50%-60% of induced miscarriages are related to embryonic chromosomal abnormalities, which is the most common cause of induced miscarriages. Then how to prevent abortion that, mainly for the possible causes of intervention, including the following aspects: 1, healthy life, physical exercise, quit bad habits. Choose a reasonable age of childbirth and avoid high age pregnancy. 2, good pre-conception preparation, oral folic acid three months before pregnancy, quit smoking and alcohol. 3. If there are more than two recurrent miscarriages, carefully examine the possible pathological factors (such as infection, endocrine and immune abnormalities) and treat them after clarifying the causes, with intervention for endocrine and immune tolerance treatment for immune abnormalities. Although miscarriage is something that pregnant women do not want to see, if it does occur, it is important to face it properly, to look carefully for the cause, and to intervene promptly if there are clear infectious, immunological or endocrine factors. Generally, a single miscarriage is an occasional event, so don’t be too nervous and afraid, face it correctly and deal with it actively.