Downs Syndrome is being discussed at the moment because there is a newer test which far more accurately predicts whether a baby has Down's Sydrome. This means there will be fewer women who will need to undergo the amniocentesis procedure which carries a small but significant risk of miscarriage.
It is not only Downs that is screened for. Looking at the NHS site, I see that there is screening for spina bifida, sickle cell anaemia, thalassaemia and other haemoglobin disorders, anancephaly, open spina bifida, cleft lip, diaphramatic hernia, lethal skeletel dysplasia, Edwards Syndrome, etc.
Some of these conditions are less serious and can be treated at some stage but others may cause death in the womb or shortly after birth, or profound physical and/or mental disabilities and a much shorter lifespan.
A mother can decline the tests if she wishes. If a baby is found to have one of the more serious conditions, a mother is provided with full information and counselling as to whether she wishes to continue with the pregnancy. Some women will choose to have the baby, others will choose a termination. I think it should be wholly the decision of the parents since they are the ones that will have to possibly spend years watching a child having painful and invasive procedures. Throughout this, they need to stay strong for their child and to cope with all the day-to-day practical difficulties and emotional turmoil that having a seriously ill child is likely to cause. Parents without external support may also have no option but to concentrate on a profoundly disabled child, at the expense of another child or children. I am sure the majority of parents do not opt for a termination without a great deal of soul-searching and sadness but it must have that choice because it is them and their family who will be affected.
Only 50% of middle age adult manage more than 1 brisk 10 min walk a month.

