If all maternal and fetal indicators are healthy, the simple presence of cough in the first trimester does not usually cause significant effects on the fetus (e.g. miscarriage). The risk of early miscarriage is significantly increased if the pregnant woman has the following conditions, which occur in early pregnancy with a prolonged high frequency of coughing: history of previous multiple early miscarriages or premature births, cervical insufficiency, history of cervical surgery (conization or LEEP knife), uterine anomalies or abnormal development (single bicornuate uterus, uterine septum), less than 18 months since the last pregnancy, excessive wasting (BMI <19), multiple pregnancies, assisted reproduction (in vitro fertilization), prolonged heavy smoking, alcohol and drug abuse, etc. If the cough is not heavy and there is no obvious fever, try to reduce the use of medication because it is early pregnancy, drink more hot water and take some oral Chinese medicine to reduce phlegm and cough; if the symptoms are not relieved, take oral anti-inflammatory drugs under the guidance of physician for symptomatic treatment; if the cough is accompanied by fever, vomiting, diarrhea, headache, general aches and pains, loss of appetite and other symptoms, especially the first three symptoms, you should be alert to the possibility of pregnancy-associated influenza. If the cough is accompanied by symptoms such as fever, vomiting, diarrhea, headache, general aches and pains, and loss of appetite, especially the first three symptoms, you should be alerted to the possibility of pregnancy-associated influenza and need active specialist consultation and treatment. Because the mother is in a special physiological period after pregnancy, her immunity decreases and influenza infection can easily lead to complications in various organs, such as pneumonia, myocarditis or pericarditis, which can be life-threatening; secondly, influenza virus infection can cause abnormal development of the embryo or fetus, resulting in an increased risk of malformation. In late pregnancy, such as after 32 weeks of gestation, mothers with prolonged cough that does not heal should be alerted to cough caused by perinatal myocarditis and pulmonary stasis after heart failure. In summary, a short, simple cough in early pregnancy has little effect on the fetus; if the cough is severe, medication should be administered under the guidance of a doctor, and should not be self-medicated or left unattended.