The exact true cause of the condition of the undescended testicle is not yet known, but it may be that the combination of a group of genetic factors in addition to the mother’s health condition with some environmental factors causes a disturbance in hormones and the appearance of physical changes and the effect on nervous activity all of these factors ultimately affect the proper development of the testicles - Also low birth weight and premature birth are among the known risk factors that can cause neonatal testicular phenomenon
Other potential risk factors are not fully understood

But some factors that may increase the risk of a suspended testicle - low birth weight - premature birth - a family history of cases of suspended testicle or other problems related to the proper development of the genital organs - medical conditions of the fetus that reduce its proper development such as "Down syndrome" or the appearance of defects In the abdominal cavity wall - the mother consumes alcoholic drinks during pregnancy - the mother smokes cigarettes or is exposed to passive smoking during pregnancy - the mother develops diabetes either type 1 or type 2 or gestational diabetes - exposes parents to different types of pesticides