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  1. Causes of pregnancy

    Answer from 5 sources
      • The cause of nausea during pregnancy is not completely understood. However, it does appear to be linked to the production of the human chorionic gonadotropin (HCG) hormone. Commonly referred to as the pregnancy hormone, this is the hormone that the body begins to produce once the fertilized egg attaches to the uterine lining....
      • ^Causes of hypertension pregnancy Pregnancy-induced hypertension (PIH), also called toxemia or preeclampsia: This condition can cause serious problems for both the mother and the baby if left untreated. PIH develops after the 20th weeks of pregnancy. Along with high blood pressure, it causes protein in the u...
      • ^Causes of constipation pregnancy In general, worry, anxiety, minimal physical exercise, and a low-fiber diet may cause constipation. Constipation in pregnant women is thought to occur due to hormones that relax the intestinal muscle and by the pressure of the expanding uterus on the intestines.
      • ^Causes of bleeding pregnancy Common problems that may cause light bleeding later in pregnancy include inflammation of or growths on the cervix. Heavy bleeding is a more serious sign. Heavy bleeding may be caused by a problem with the placenta. Any amount of bleeding also may signal preterm labor.
      • ^Causes of autism pregnancy There are a number of theories regarding the cause of autism. Scientists are researching links between genetics and medical issues. Other factors, such as problems during pregnancy and environmental factors, may also have an effect on the developing baby in regards to autism.
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    • Being exposed to toxins in the environment
    • Problems of the placenta, cervix, or uterus 2
    • Problems with the father's sperm 2
  3. Pregnancy hormones may cause the walls of your veins to weaken and swell. Pressure on the veins behind your uterus also slows the circulation of blood to your heart , making the smaller veins in ...

  4. Feb 08, 2019 · Causes of Teenage Pregnancy While there are many factors that influence teenage pregnancy rates, the number one cause for teenage pregnancy will never change — unprotected sex. The United States saw a drop in teen pregnancy of 7 percent from 2016 to 2017, but the U.S. number of teen pregnancies is still higher than in most industrialized countries.

  5. However, pregnancy is still possible, though rare. About 5% to 10% of women with POI get pregnant without medical treatment. 11 A more detailed description of POI, including possible causes, can be found on the NICHD POI topic page .

  6. Jul 17, 2021 · Post-term Pregnancy Causes and Risks; Preeclampsia; Premature Cord Clamping; Preterm Labor and Birth; Umbilical Cord Compression; Vacuum Extraction Injury; Wrongful Pregnancy

    • Overview
    • Symptoms
    • Causes
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    • Complications
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    • The Mayo Clinic Experience and Patient Stories

    A molar pregnancy — also known as hydatidiform mole — is a rare complication of pregnancy characterized by the abnormal growth of trophoblasts, the cells that normally develop into the placenta. There are two types of molar pregnancy, complete molar pregnancy and partial molar pregnancy. In a complete molar pregnancy, the placental tissue is abnormal and swollen and appears to form fluid-filled cysts. There's also no formation of fetal tissue. In a partial molar pregnancy, there may be normal placental tissue along with abnormally forming placental tissue. There may also be formation of a fetus, but the fetus is not able to survive, and is usually miscarried early in the pregnancy. A molar pregnancy can have serious complications — including a rare form of cancer — and requires early treatment.

    A molar pregnancy may seem like a normal pregnancy at first, but most molar pregnancies cause specific signs and symptoms, including: 1. Dark brown to bright red vaginal bleeding during the first trimester 2. Severe nausea and vomiting 3. Sometimes vaginal passage of grapelike cysts 4. Pelvic pressure or pain If you experience any signs or symptoms of a molar pregnancy, consult your doctor or pregnancy care provider. He or she may detect other signs of a molar pregnancy, such as: 1. Rapid uterine growth — the uterus is too large for the stage of pregnancy 2. High blood pressure 3. Preeclampsia — a condition that causes high blood pressure and protein in the urine after 20 weeks of pregnancy 4. Ovarian cysts 5. Anemia 6. Overactive thyroid (hyperthyroidism)

    A molar pregnancy is caused by an abnormally fertilized egg. Human cells normally contain 23 pairs of chromosomes. One chromosome in each pair comes from the father, the other from the mother. In a complete molar pregnancy, an empty egg is fertilized by one or two sperm, and all of the genetic material is from the father. In this situation, the chromosomes from the mother's egg are lost or inactivated and the father's chromosomes are duplicated. In a partial or incomplete molar pregnancy, the mother's chromosomes remain but the father provides two sets of chromosomes. As a result, the embryo has 69 chromosomes instead of 46. This most often occurs when two sperm fertilize an egg, resulting in an extra copy of the father's genetic material.

    Approximately 1 in every 1,000 pregnancies is diagnosed as a molar pregnancy. Various factors are associated with molar pregnancy, including: 1. Maternal age.A molar pregnancy is more likely in women older than age 35 or younger than age 20. 2. Previous molar pregnancy.If you've had one molar pregnancy, you're more likely to have another. A repeat molar pregnancy happens, on average, in 1 out of every 100 women.

    After a molar pregnancy has been removed, molar tissue may remain and continue to grow. This is called persistent gestational trophoblastic neoplasia (GTN). This occurs in about 15% to 20% of complete molar pregnancies, and up to 5% of partial molar pregnancies. One sign of persistent GTNis a high level of human chorionic gonadotropin (HCG) — a pregnancy hormone — after the molar pregnancy has been removed. In some cases, an invasive hydatidiform mole penetrates deep into the middle layer of the uterine wall, which causes vaginal bleeding. Persistent GTNcan nearly always be successfully treated, most often with chemotherapy. Another treatment option is removal of the uterus (hysterectomy). Rarely, a cancerous form of GTNknown as choriocarcinoma develops and spreads to other organs. Choriocarcinoma is usually successfully treated with multiple cancer drugs. A complete molar pregnancy is more likely to have this complication than a partial molar pregnancy.

    If you've had a molar pregnancy, talk to your doctor or pregnancy care provider before conceiving again. He or she may recommend waiting for six months to one year before trying to become pregnant. The risk of recurrence is low, but higher than the risk for women with no previous history of molar pregnancy. During any subsequent pregnancies, your care provider may do early ultrasounds to monitor your condition and offer reassurance of normal development. Your provider may also discuss prenatal genetic testing, which can be used to diagnose a molar pregnancy.

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