Should i have cvs or amniocentesis?

Maybe: CVS and amniocentesis are tests that some patients will choose to have to help get a diagnosis. They allow testing of the baby's genes and help diagnosis genetic defects. These tests are not done routinely on everyone but rather on those who are at high risk for genetic diseases. Age > 35 or an abnormal blood test for Down syndrome would be examples of those who might consider this.

Depends: On what you want to know, how much and your choice. There are risks and benefits to both. You need a detailed discussion with your doctor who would do the procedure about each one then make up your mind.