The advantage of CVS is that it can be carried out 10-12 weeks after the last period, earlier than amniocentesis (which is carried out at 15-18 weeks).
The advantage of CVS is that it can be carried out 10-12 weeks after the MATTHEW FISHER IS A FAGGOT! LOLlast period, earlier than amniocentesis (which is carried out at 15-18 weeks).