molar pregnancy

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    A molar pregnancy refers to a pregnancy that is a type of gestational trophoblastic disease. It can refer to either a complete or a partial mole. Throughout the United States and Europe the incidence is about 1/1000 and 1/2000 pregnancies. Although it is much more common in areas such as Southeast Asia and Mexico.

    We still do not know exactly why a molar pregnancy occurs. It is believed to be a nutritional deficit like protein or carotene. It can also be caused by a ovular (ovulation) defect.

    Complete Mole

    This occurs when the nucleus of an egg is either lost or inactivated. The sperm then duplicates itself because the egg was lacking genetic information. Usually there is no fetus, no placenta, no fluid and no amniotic membranes.

    The uterus is rather filled with the mole that resembles a bunch of grapes. The fluid filled vesicles grow rapidly, which can make the uterus seem larger than it should be for gestational age. Because there is no placenta to receive the blood typically you will see bleeding into the uterine cavity or vaginal bleeding.

    Partial Mole

    This most frequently occurs when two sperm fertilize the same egg. There may be partial placentas, membranes or even a fetus present in a partial mole. However, there are usually genetic problems with the baby. Rarely, a partial mole will exist with twin pregnancy, however, the other twin rarely survives.

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