When is amniocentesis needed to be done?

Tests of chromosomes during pregnancy, including screening methods such as tang sieve, noninvasive DNA, and prenatal diagnostic modalities for confirming the diagnosis, such as villus biopsy, amniocentesis, and cord blood puncture.

For pregnancy, we often face the choice of screening methods, for Tang screening and non-invasive DNA such screening tests, no matter what the result is, can not determine the fetus to stay, the need for amniocentesis and other prenatal diagnosis, to confirm the chromosomal situation, if there is indeed a chromosomal abnormality, in order to determine the fetus to stay, the so-called amniocentesis, referred to as sheep puncture, is the most commonly used way of diagnosing fetal chromosomes during pregnancy.

Common indications for choosing amniocentesis during pregnancy, such as advanced pregnant women, especially those over the age of 38; previous birth history of children with chromosomal abnormalities; family genetic history; tang screening or noninvasive DNA high risk.

Amniocentesis is usually performed between 15 and 23 weeks of pregnancy. The specific method is to first select a hospital with ultrasound diagnosis qualifications for appointment; improve the preoperative examination and determine the puncture time; take the supine position during pregnancy, locate it under ultrasound guidance, enter the needle, and extract the amniotic fluid in the amniotic cavity for examination.

For amniocentesis, is a highly professional examination, although the process sounds more daunting, but, to believe that your doctor, have good compliance, timely acceptance of the doctor's professional advice, when there is a sign to do sheep wear such a confirmatory test, we should not be very afraid of sheep wearing such invasive examination, because the overall fetal loss ratio is less than 0.5%, belongs to the small probability event, in the case of weighing the pros and cons, it can be carried out normally.