ad. 29. When to undergo amniocentesis?

This examination is performed after 15 weeks of pregnancy (15+0). It is worth to mention that there is a possibility to perform cordocentesis after 30 weeks. Such an examination is offered to patients who did not decide on amniocentesis between 15 and 16 weeks of pregnancy in fear of miscarriage. After 30 weeks there is only a slight risk of an early birth with nearly 100% of survival.