Embryo triploidy formation can be caused by too many sperm entering the egg, maternal age, and chromosomal abnormalities. When two sperms enter the egg at the same time and there is an abnormality in the combination of sperm and egg, it will lead to embryo triploidy formation in the patient. When the patient is older, the body’s resistance is weakened, and the probability of chromosome segregation is higher with age, which may lead to poorer quality of eggs and chromosome segregation, thus resulting in triploidy formation of embryos. Chromosomal abnormalities in one of the spouses may affect the combination of sperm and egg, which may also lead to triploidy. In the case of triploid formation, there may be fetal malformations, mental impairment, fetal arrest, and miscarriage.