Answer: Actually, If it used to live in your mouth and it goes into your stomach, it will die because of your stomach acid. if it it causes an infection (which it shouldn't), you might want to ask your doctor.
The most common aneuploidy that infants can survive with is trisomy 21, which is found in Down syndrome, affecting 1 in 800 births. Trisomy 18 (Edwards syndrome) affects 1 in 6,000 births, and trisomy 13 (Patau syndrome) affects 1 in 10,000 births.