I am 19 weeks pregnant with dcda twins of which twina amnio fish result has come back positive for downs with various abnormalities & advised with selective termination. how safe is this for my twinb and myself using kcl injection & stopping heart?

Selective termination of a twin with confirmed genetic abnormality, using KCL to inject the heart of twin A requires an expert in maternal/fetal medicine to provide an appropriate dose and monitor the pregnancy even after the procedure. This should be done at a university setting, with appropriate specialist managing post procedure. The maternal effect should be minimal.