![]() ![]() ![]() The use of the ultrasound image can determine gestational age and the placement of the fetus and placenta, and evaluate if enough amniotic fluid is present. Ultrasound examination is always performed before an amniocentesis to determine the location of the fetus during the procedure. During the third trimester of pregnancy but less than 35 to 36 weeks' gestation, fluid collected from the amniocentesis procedure is analyzed to evaluate FLM. Fetal cells in the fluid can be tested in the laboratory and studied to detect the presence of certain genetic disorders or physical abnormalities, and examined to determine the gender of the fetus. Prenatal testing of several fetal disorders using amniotic fluid first occurs between 14 and 20 weeks' gestation. Laboratory testing of amniotic fluid involves analysis of bilirubin, AFP, and a variety of tests for fetal lung maturity (FLM). ![]() These risk factors include age of the mother over 35 years, diabetic mothers, mothers who have other children who have a genetic problem, mothers who have had an abnormal serum triple screen test (AFP, estriol, and hCG) and mothers who are Rh sensitized. Amniocentesis is the fluid collection procedure in which a sample of the amniotic fluid surrounding a fetus is removed by means of a fine needle inserted through the abdomen and into the uterus of the pregnant woman.Īmniocentesis is commonly performed for women whose pregnancies may be high risk. The primary function of amniotic fluid is to provide a protective cushion for the fetus, allow for movement, and regulate temperature. ![]()
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