A female 28, primi with a twin pregnancy. 27weeks 4 days Foetus. A 380 gms Foetus B 890 gms thus it is a case of Twin-to-twin transfusion syndrome (TTTS). How would you like to manage?

Why was it not detected right at the beginning? I f fetus A dies (IUD) will it be an emergency CS? Does the mother carry risk? Give your opinions