A complete mole is a type of gestational trophoblastic disease that occurs when an egg with no genetic material is fertilized by a sperm. This results in the growth of abnormal tissue instead of a normal embryo. The tissue forms a mass called a mole, which can lead to complications if not treated. Complete moles are characterized by the presence of only paternal chromosomes, leading to an overgrowth of placental tissue. Symptoms may include vaginal bleeding, an enlarged uterus, and elevated levels of the hormone human chorionic gonadotropin (hCG). Early diagnosis and treatment are essential to prevent further health issues.