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High progesterone levels during early pregnancy are a normal occurrence because progesterone is produced in the placenta, according to the National Women's Health Resource Center. High progesterone levels combined with h... More »

Progesterone helps maintain a pregnancy until birth, according to the American Pregnancy Association. The corpus luteum produces the hormone to thicken and prepare the uterine lining for implantation. It continues to pro... More »

Some early signs of pregnancy are tender breasts, fatigue and mood swings, according to WebMD. Some women may also be disgusted by certain foods, feel lightheaded, or suffer from nausea and vomiting in early pregnancy. More »

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High progesterone levels are not an accepted indication of being pregnant with twins; rather, high levels can indicate pregnancy, cancer or overproduction of hormones, notes Everyday Health. The most accurate way to lear... More »

While early pregnancy often involves abdominal symptoms, it is not necessarily the case that any kind of "weird feeling" indicates pregnancy. Abdominal symptoms associated with early pregnancy include constipation, bloat... More »

During pregnancy, if a mother is infected with cytomegalovirus, the virus in her blood crosses over the placenta and infects her fetus' blood. It is most common for a pregnant mother to receive exposure to cytomeglovirus... More »

Dangers of toxemia, also known as preeclampsia, during pregnancy include decreased blood flow, placenta detachment, seizures, the onset of HELLP syndrome and the risk of future heart disease, according to Mayo Clinic. Th... More »