A biochemical pregnancy is a spontaneous abortion that occurs within five weeks of pregnancy. For women with a high number of biochemical pregnancies, the following aspects can be considered: first, the endometrium is less capacious or has a hypercoagulable state due to maternal factors. Secondly, decreased embryonic fertility, such as aneuploidy of the embryo chromosomes, and poor culture environment. Finally, biochemical pregnancy is also associated with genetic factors, when the pregnant woman is exposed to drugs or other infections that can easily affect the chromosomes and cause chromosomal abnormalities, resulting in biochemical pregnancy. A woman with a biochemical pregnancy may experience a small amount of vaginal bleeding or even abdominal pain. It is recommended that women during pregnancy pay attention to observation and go to the hospital as soon as they have uncomfortable symptoms to prevent biochemical pregnancy.