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Myasthenia gravis is a complex autoimmune disorder. It causes antibodies to destroy the connections between your muscles and nerves. This causes muscle weakness and tiredness.

Pre-existing heart disease is a heart problem that you had before you got pregnant. This often means a heart condition that you were born with (congenital).

Chorioamnionitis [chor-y-oh-am-nee-oh-NY-tis] is an infection of the placenta and the amniotic fluid. Only a few women get it. But it is a common cause of preterm labor and delivery.

Chorionic villus sampling (CVS) is a test done early in a woman’s pregnancy. CVS checks for genetic problems in your baby. During CVS, your healthcare provider takes a small piece of tissue from the placenta for testing.

Fetal blood sampling is a procedure to take a small amount of blood from an unborn baby (fetus) during pregnancy. Fetal blood sampling is usually done by a perinatologist with special training. This is a doctor who specializes in the care of babies in high-risk pregnancies.

In pregnancy and during labor, your health care provider will check your unborn baby’s heart rate and other functions. Monitoring can be done on the outside of your belly (external monitoring). Or it may be done directly on the baby while inside your uterus (internal monitoring). Fetal monitoring is a very common procedure.

Many pregnant women have some nausea and sometimes vomiting in the first trimester. A few pregnant women have a severe kind of nausea and vomiting called hyperemesis gravidarum. Read on to learn more about this condition.

Graves disease is a condition where the thyroid gland makes too much thyroid hormone. This is called hyperthyroidism or overactive thyroid. Graves disease is the most common cause of hyperthyroidism during pregnancy.

Detailed information on high-risk pregnancy