Amniocentesis is a specialised diagnostic test done between 15 and 18 weeks gestation that involves a small amount of amniotic fluid from your womb. This test will tell you if your unborn baby has any chromosomal abnormalities, if its lungs are mature and what sex your baby is. The results of a amniocentesis is a definate result.
Not every one needs a amniocentesis, mainly women who would like to do further testing for chromosomal abnormalities will have a amniocentesis. The option is there for all women to make if they wish. A amniocentesis can be performed after 18 weeks to check the maturity of a babies lungs.
A amniocentesis is performed by a doctor using a ultrasound to identify a safe pocket of amniotic fluid away from your baby and placenta. The doctor will then instert a thin, long and hollow needle into your abdomen into the pocket of amniotic fluid. The doctor will then collect about 20mls of amntiotic fluid. The test takes about 30 minutes to conduct.
The risks of miscarriage from a amniocentesis is around 1 in 200. About 1 in 200 women will develop a infection or some other complication that can then lead to miscarriage. Some women will leak amniotic fluid or lose a small amount of blood from their vagina. If you expereince any of these symptoms, or other symptoms that could indicate a infection, call your doctor immediately.
Results from a amniocentesis will be available to you after 14 days, but at a extra cost it is possible to get the results within 36 hours.
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