A member asked:

Can i do chorionic villus sampling in the first trimester?

7 doctors weighed in across 2 answers
Dr. Scott Kramer answered

Specializes in Gynecology

Yes: Yes usually after 9 weeks. Can also do nuchal cord ultrasound as screen for down's syndrome.

Answered 6/15/2011

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Yes: Chorionic villus sampling (cvs) is done in the first trimester between 10-12 weeks. It has a slightly higher risk of miscarriage associated with it than an amniocentesis- which is usually done after 15 weeks- because it is performed earlier in the pregnancy. Blood tests and a nuchal translucency ultrasound are noninvasive genetic screening options.

Answered 8/23/2012

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