Hydatidiform mole, also known as molar pregnancy or gestational trophoblastic disease, is a rare abnormality that occurs during pregnancy. It is caused by the abnormal growth of cells that are supposed to develop into the placenta, which provides nutrients and oxygen to the developing fetus. Instead of forming a healthy placenta, the cells form a mass or tumor that can cause complications for both the mother and the fetus.
Overall, hydatidiform mole is a rare but serious condition that requires prompt diagnosis and treatment. Women who experience vaginal bleeding during pregnancy should seek medical attention right away to rule out this and other potential complications.