Fetal arrest in the 7th month of pregnancy may be related to placenta, umbilical cord, fetus, mother and external factors, the common analysis are as follows: 1, placenta factors: such as placenta praevia, placenta abruptio, acute chorioamnionitis and other factors cause fetal growth arrest; 2, umbilical cord factors: such as cord prolapse, twisting, twisting, knotting, umbilical cord root is too thin resulting in fetal blood transport disorder, umbilical cord wrapped around the neck too tight and other factors 3, fetal factors: such as serious fetal infections, malformations, chromosomal abnormalities, maternal and child blood type incompatibility, intrauterine viral infections and other factors that cause fetal growth arrest; 4, maternal factors: such as maternal combined hypertension, diabetes, cardiovascular disease, hyperthermia and other factors that cause fetal growth arrest; 5, external factors: encountered external adverse stimuli, such as accidental impact on the abdomen, exposure to radioactive toxins, taking The fetus development is stopped due to the exposure to radioactive toxins, taking certain drugs, frequent exposure to toxic substances, etc. If the embryonic arrest is found in the seventh month of pregnancy, you need to go to the hospital for a comprehensive examination in time, and if it is diagnosed as fetal arrest, cooperate with the doctor to take targeted treatment in time.