How does this form a mole? Is there a high probability that it will be formed?

Hydatidiform mole refers to an abnormal pregnancy in which the number of placental villi trophoblasts increases after pregnancy, causing interstitial edema to form multiple blisters of different shapes and connected in a string. The main causes of the formation are dietary factors, endocrine disorders, ethnic factors, etc. The incidence of this disease is relatively low in clinical practice.