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Molar Pregnancy: Symptoms, Causes, Types, Diagnosis, Prevention, Risks, and Treatment
Home  >  Gynaecology  > Molar Pregnancy

Molar Pregnancy: Symptoms, Causes, Types, Diagnosis, Prevention, Risks, and Treatment

NIH reports that every 1 in 160 pregnancies is a molar pregnancy in India. Though rare, the condition is extremely serious and needs early treatment. Else, the complications include life-threatening bleeding, and formation of a rare form of cancer, and death. This page lists down everything about the condition, symptoms, treatment options, cost, insurance coverage, the best doctors in India, and more.

NIH reports that every 1 in 160 pregnancies is a molar pregnancy in India. Though rare, the condition is extremely serious and needs early ... treatment. Else, the complications include life-threatening bleeding, and formation of a rare form of cancer, and death. This page lists down everything about the condition, symptoms, treatment options, cost, insurance coverage, the best doctors in India, and more. Read More

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Best Doctors for Molar Pregnancy

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    Dr. Sheetal Agarwal  - Molar Pregnancy Treatment Specialist in Pristyn Care Diyos Hospital, Safdarjung Enclave, Delhi, over 38+  Years Experience

    Dr. Sheetal Agarwal

    MBBS, DNB-Obs&Gynae
    38+ Yrs.Exp.

    4.5/5

    38+ Years Experience

    location icon Pristyn Care Diyos Hospital, Safdarjung Enclave, Delhi
    Call Us
    080-6962-5908
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    Dr. Rahul Manchanda - Molar Pregnancy Treatment Specialist in Pristyn Care Elantis Hospital, Lajpat Nagar, Delhi, over 32+  Years Experience

    Dr. Rahul Manchanda

    MBBS, MD-Obs & Gynae
    32+ Yrs.Exp.

    4.5/5

    32+ Years Experience

    location icon Pristyn Care Elantis Hospital, Lajpat Nagar, Delhi
    Call Us
    080-6962-5907
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    Dr. Sharmila Chhabra - Molar Pregnancy Treatment Specialist in Pristyn Care Sheetla Hospital, Sector 8, Gurgaon, over 32+  Years Experience

    Dr. Sharmila Chhabra

    MBBS, MD-Obs&Gyane
    32+ Yrs.Exp.

    4.5/5

    32+ Years Experience

    location icon Pristyn Care Sheetla Hospital, Sector 8, Gurgaon
    Call Us
    080-6542-3711
  • About TreatmentCostOur DoctorsInsuranceRecovery
    What Is Molar Pregnancy?
    How Common Is Molar Pregnancy?
    Types of Molar Pregnancy
    Symptoms of Molar Pregnancy
    Causes of Molar Pregnancy
    Risk Factors for Molar Pregnancy
    Diagnosis of Molar Pregnancy
    Treatment of Molar Pregnancy
    Risks and Complications of Untreated Molar Pregnancy
    Prevention of Molar Pregnancy

    What Is Molar Pregnancy?

    A molar pregnancy, also known as a hydatidiform mole, is a rare pregnancy complication that occurs when abnormal tissue grows inside the uterus instead of a healthy embryo and placenta. It is a type of gestational trophoblastic disease (GTD), a group of conditions involving abnormal growth of cells that normally develop into the placenta.

    In a molar pregnancy, the fertilized egg does not develop normally. Instead, abnormal placental tissue forms and fills the uterus. A molar pregnancy cannot result in a viable baby and requires prompt medical treatment to prevent complications.

    Although uncommon, early diagnosis and treatment are highly effective and help prevent long-term health issues.

    How Common Is Molar Pregnancy?

    Molar pregnancy is a relatively rare condition but remains an important cause of abnormal pregnancy.

    Some important facts about molar pregnancy include:

    • Approximately 1 in every 1,000 pregnancies may be a molar pregnancy.
    • It is more common in women under 20 or over 40 years of age.
    • Most molar pregnancies are diagnosed during the first trimester.
    • Early ultrasound and pregnancy monitoring have improved detection rates.
    • Most women recover completely after treatment.
    • The risk of recurrence is low but slightly higher in women who have had a previous molar pregnancy.

    Regular prenatal care plays an important role in early diagnosis.

    Types of Molar Pregnancy

    1. Complete Molar Pregnancy

    In a complete molar pregnancy, there is no normal fetal tissue. The fertilized egg contains only abnormal placental tissue that grows inside the uterus.

    Characteristics include:

    • No developing fetus
    • Abnormal placental growth
    • Higher risk of persistent gestational trophoblastic disease

    2. Partial Molar Pregnancy

    A partial molar pregnancy occurs when abnormal placental tissue develops along with some fetal tissue. However, the fetus is usually severely abnormal and cannot survive.

    Characteristics include:

    • Presence of abnormal fetal tissue
    • Abnormal placenta
    • Lower risk of complications compared to complete moles

    Symptoms of Molar Pregnancy

    Symptoms may initially resemble those of a normal pregnancy but often become abnormal as the condition progresses.

    Common Symptoms of Molar Pregnancy

    • Vaginal bleeding during early pregnancy
    • Severe nausea and vomiting
    • Rapid uterine enlargement
    • Pelvic pressure or discomfort
    • Passage of grape-like cysts through the vagina
    • Absence of fetal movement
    • Positive pregnancy test

    Symptoms of Advanced Molar Pregnancy

    • High blood pressure during early pregnancy
    • Anemia
    • Ovarian cysts
    • Excessive fatigue
    • Signs of hyperthyroidism such as rapid heartbeat and nervousness

    Medical evaluation is essential if abnormal bleeding occurs during pregnancy.

    Causes of Molar Pregnancy

    Molar pregnancy develops because of abnormal fertilization during conception.

    Common Causes of Molar Pregnancy

    • Genetic Abnormalities- The condition occurs when chromosomes from the sperm and egg combine abnormally.
    • Abnormal Fertilization- In a complete mole, the egg lacks maternal genetic material and is fertilized abnormally.
    • Multiple Sperm Fertilization- Partial molar pregnancies often occur when two sperm fertilize the same egg.
    • Maternal Age- Very young and older maternal age are associated with increased risk.
    • Previous Molar Pregnancy- Women with a history of molar pregnancy have a higher risk of recurrence.

    Although the exact cause is not always known, abnormal chromosome formation is the primary underlying mechanism.

    Risk Factors for Molar Pregnancy

    Several factors can increase the likelihood of developing a molar pregnancy.

    Age Below 20 or Above 40- The risk is highest at the extremes of reproductive age.

    Previous Molar Pregnancy- A prior molar pregnancy increases recurrence risk.

    History of Miscarriage- Some studies suggest an association with recurrent pregnancy loss.

    Nutritional Deficiencies- Deficiencies in certain nutrients, such as vitamin A, may contribute in some populations.

    Geographic and Ethnic Factors- Incidence rates may vary across different regions of the world.

    Diagnosis of Molar Pregnancy

    Doctors diagnose molar pregnancy using a combination of clinical examination, blood tests, and imaging studies.

    Medical History and Physical Examination

    The doctor may evaluate:

    • Vaginal bleeding
    • Uterine size
    • Pregnancy symptoms
    • Blood pressure

    Blood Tests

    hCG Testing

    Women with molar pregnancy often have extremely high levels of human chorionic gonadotropin (hCG).

    Ultrasound

    Ultrasound is the most important diagnostic test.

    Typical findings may include:

    • Absence of a normal fetus in complete mole
    • Abnormal placental tissue
    • “Snowstorm” or “cluster of grapes” appearance

    Histopathological Examination

    After treatment, tissue samples are examined under a microscope to confirm the diagnosis.

    Treatment of Molar Pregnancy

    Treatment aims to remove abnormal tissue and prevent complications.

    Uterine Evacuation (Dilation and Curettage)

    Dilation and curettage (D&C) is the most common treatment.

    During the procedure:

    • The cervix is gently opened
    • Abnormal tissue is removed from the uterus
    • Tissue is sent for laboratory analysis

    Hysterectomy

    In selected women who do not wish to become pregnant in the future, removal of the uterus may be considered.

    Follow-Up Monitoring

    Regular monitoring of hCG levels is essential after treatment to ensure all abnormal tissue has been removed.

    Patients may require:

    • Weekly hCG testing initially
    • Monthly follow-up testing
    • Contraception during the monitoring period

    Treatment of Persistent Disease

    If abnormal tissue continues to grow after treatment, additional therapies such as chemotherapy may be required.

    Risks and Complications of Untreated Molar Pregnancy

    Without treatment, molar pregnancy can lead to serious complications.

    Persistent Gestational Trophoblastic Disease (GTD)- Abnormal tissue may continue growing after the pregnancy is removed.

    Invasive Mole- The abnormal tissue may grow into the uterine wall.

    Heavy Vaginal Bleeding- Significant blood loss can occur if treatment is delayed.

    Severe Anemia- Chronic bleeding may lead to anemia.

    Hyperthyroidism- Very high hCG levels may overstimulate the thyroid gland.

    Gestational Trophoblastic Neoplasia (GTN)- Rarely, molar pregnancy can develop into a malignant form of trophoblastic disease.

    Prevention of Molar Pregnancy

    There is no guaranteed way to prevent a molar pregnancy. However, certain measures may help with early detection and management.

    Attend Early Prenatal Visits- Routine prenatal care can help identify abnormalities early.

    Seek Evaluation for Pregnancy Bleeding- Any abnormal bleeding during pregnancy should be assessed promptly.

    Follow Up After a Previous Molar Pregnancy- Women with a history of molar pregnancy should receive early ultrasound evaluation in future pregnancies.

    Maintain General Reproductive Health- Regular gynecological care supports early diagnosis of pregnancy-related complications.

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    FAQs around Molar Pregnancy Treatment

    How common is a molar pregnancy?

    Globally, one in every 1000 pregnancies is a molar pregnancy. However, NIH reports that the cases of molar pregnancy are much higher in India, that is- one in every 160 pregnancies.

    Can molar pregnancy happen twice?

    Yes. Reports suggest that 1 in every 100 women may have a repeat case of molar pregnancy if they have had it before.

    What is the most common type of molar pregnancy?

    Data reports that ‘complete molar pregnancy is a more common type of pregnancy than ‘partial molar’ pregnancies.

    When is molar pregnancy most common?

    Molar pregnancy is most common in early teens or with women in their forties.

    Can a molar pregnancy result in a healthy baby?

    No. A molar pregnancy is not a viable pregnancy.

    Can women die because of molar pregnancy?

    Yes, if the molar pregnancy is not removed in time, the woman may bleed to death or develop a rare form of cancer known as- gestational trophoblastic neoplasia (GTN).

    Which type of doctor removes molar pregnancy?

    A gynecologist is the most ideal doctor to remove molar pregnancies. A substantial experience of handling prior cases of molar pregnancies or gestational trophoblastic neoplasia (GTN ) is even better.

    What are the symptoms of a molar pregnancy?

    Common symptoms include vaginal bleeding, severe nausea, pelvic discomfort, and unusually high pregnancy hormone levels.

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