Tenar does your DP realise you would never be OFFERED a termination for a 1:100 chance of Down's or any other chromasomal disorder? The option isn't presented like that.

You would have the N/T, then based on that result (which might be high or medium or low) they would offer you CVS or amniocentesis. From THOSE results they would tell you if your baby had chromasomal disorders or not and then and ONLY then would termination be offered as a possibility, IF the baby had a chromasomal problem. Based only on NT results you would have to go to the doctor and have a termination for social resons (i.e. don't want the baby). Any doctor, even if you had a VERY high risk factor on the NT, would counsel against termination on those results, the NT is NOT a diagnostic test, it screens for risk factor only.

I do know of a woman who had terrible CVS results and decided against medical advice to continue (they wanted to wait for the amnio, but decided not to have it due to the miscarriage risk, then wanted to wait for the 20 week scan which was only a few weeks away anyway, and everything looked surprisingly ok so they went on) the pregnancy and had a completely healthy girl. The placenta is formed from the father's RNA (Ryn please come in here and correct me!) and is closely linked to the baby but NOT the same as the baby's DNA. You CAN get a baby with a chromasomally damaged placenta/cord who is healthy.

Bx