Hi guys, complacated problem undoetunately. Am 13 weeks with non identical twins. The 12 week scan on Wednesday showed severe issues with twin 2. The lower body has not developed properly. It is missing limbs, as well as probably bladder, kidneys etc. If it were to survive it would be severely disabled with limited wuslity if life. The consultant thinks it has issues which are likely not survivable, but we would not know this for sure until later on. Twin 1 is healthy. The hospital have offered selective termination of the sick twin. Sadly there is a 5 percent rusk of losing the healthy twin.
However, if we do not act now, sick twin could die, taking healthy twin with it, or it could survive longer, maybe even be born, but possibly die very quickly after birth, or if not, survive for a time, but gave a very u pleasant short life. This would also mean compromising the quality of life of our cureent small child (who is 1) as well as the healthy twin, as the sick one would need so much care.
I feel like I'm damned whatever I do. I ve also nrver agreed with abortion (personal choice- not judging anyone else) and I'm mortified to be in this position.
I should also say that pregnancy has never come easy to me- so there are no guarantees that this would not be my last prwgnancy if we lost both Babies. 
Any words of wisdom?