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Second Trimester Complications that May Cause Miscarriage: Incompetent Cervix, Placenta Abruption, and Prenatal Testing© Mischele Lewis After you pass the first trimester, the risk of miscarriage lessens but is not eliminated. Later miscarriages may result from an infection or an abnormality in the uterus or in the placenta. Incompetent Cervix Doctors have no foolproof method of diagnosing cervical incompetence; often, the only clues come from a patient's clinical history. You could have an increased risk of incompetent cervix if you've had a second trimester miscarriage or pre-term labor with minimal or no uterine contractions. As treatment, your doctor may recommend a cerclage - a precautionary surgical procedure usually done in the late first or early second trimester. Under anesthesia, a doctor will place a strong stitch around the cervix in an attempt to reinforce it. Afterward, you may need to avoid strenuous activity or be on bedrest until the baby is full term. Placenta Abruption There is no clear-cut cause of abruption. When the separation is minor, bedrest usually stops the bleeding. In severe cases where more than half the placenta separates, it can cause fetal demise and miscarriage if caught too late. If the separation occurs late in the second trimester or in the third, sometimes delivering the baby can prevent the loss of a child, but not always. Prenatal Testing and Miscarriage Go To Page: 1
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