system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 35-year-old G4P3 at 18 weeks presents with sequential screening( Dual and then triple marker screening) of 1:170 for Down syndrome. You should do which of the following?
assistant
The correct answer is  At age 35 should the patient should be offered genetic counseling and Amniocentesis. CVS is not appropriate at 18 weeks' gestation If required; the invasive test of choice here is Amniocentesis.