At 16 weeks I received a phone call from the Women's Health Clinic at Flinders Medical Centre. The midwife explained that the results from my blood serum screening test for came back indicating a high risk for Trisomy 18 - an always fatal chromosomal abnormality - in the fetus. I was stressed but I told myself not to worry as there 70/71 chance that I would test negative with a further testing. I had an ultrasound booked for the next day. If the ultrasound showed any signs of the condition, I would definitely have an amniocentesis to confirm.