<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello, I have a healthy 5 year old and am TTC a second. I has an IUI which resulted in a Trisomy 18 Pregnancy. After that loss I had another IUI which resulted in a pregnancy with low and slow rising ChatDoctor s, and two gestational sacs at the 6w3d ultrasound . Both measured 3mm with no yolks. My questions are: is it still possible to have a healthy viable pregnancy? what should I suspect as the cause, assuming both died at the same time, 4w 5d? I can t find other examples of twins being behind by exactly the same amount. what tests if any should I run before my next IUI? is there an infertility treatment that would boost my odds of success? Thanks!! Thank you!  <response>: Hi, Welcome to Chat Doctor Yes it is still possible to have healthy viable pregnancy. It appears to be due to genetic defectchromosomal disorder. You have not mentioned your age. Risk of trisomy 21,18 and 13 increases with maternal age 30 yrs. For prophylaxis, you can start tablet Folic acid daily at least 3 months before conception. Maintain healthy diet. Avoidance of smoking and alcohol is advised. Once you are pregnant it would be ideal to undergo first trimester screening 11-14 was for major anomalies by doing a blood test and ultrasound. Take care. 