It is possible to miscarry an embryo with a chromosome 4 duplication. Chromosome 4 duplication is a type of chromosomal abnormality. Chromosomal abnormality will lead to abnormal development of the embryo, and some of the embryos with serious abnormality may stop to continue to develop, which is manifested by the cessation of fetal heartbeat, and then there is a possibility of miscarriage. Some embryos with chromosomal abnormalities may continue to develop and be delivered successfully, but the child may have malformations, developmental delays and other problems that will affect its subsequent growth and development. Therefore, it is necessary to pay attention to the chromosome 4 abnormality in the previous or current pregnancy, complete all the obstetric tests on time, and terminate the pregnancy as soon as possible if necessary. It is recommended to consult a doctor in time for standardized diagnosis and treatment.