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There are two options for determining paternity before the child is born, however both present some risk of miscarriage and require a doctor's consent before they can be performed as listed below : Chorionic Villus Sampling ( CVS ) - A small sample of chorionic villi is collected through a thin needle inserted into the uterus through the vagina. Chorionic villi is tissue from the uterus wall and has a genetic makeup identical to that of the fetus. This procedure can be performed as early as 13 weeks into pregnancy. Amniocentesis - In this test, a small sample of amniotic fluid is collected through a small needle inserted through the abdomen and into the uterus. This test can be done during the second trimester (14 to 20 weeks into pregnancy) but also presents the risk of harm to the fetus as well as vaginal bleeding, miscarriage and loss of amniotic fluid.

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