Transabdominal CVS can be done in:
chorionic villous sampling trancervical:done in 10-12 weeks transabdominal:10 weeks to term D.C.DUTTA&;S TEXTBOOK OF OBSTETRICS,Pg no:107,7th edition
7-9 weeks
11-13 weeks
8-9 weeks
done before 10 weeks
Diagnosis in obstetrics