<human>: Can you summarize the given text in a few sentences?

My father's wife was pregnant many years ago, it was (supposed to be) a girl, and I was at that time told that she had heart problems and was born dead. When I was old enough my dad told me that the child was in fact diagnosed with Turner syndrome and that they had decided on abortion.

Now, even more years later, I can't help but wonder when enough is enough. Yes, Turner children do in fact live a shorter life, are incapeable of reproducing, heart problems, never really evolve from puberty, etc. 
But why shouldn't these be allowed to live? I understand that my father's wife did it for the sake of the child, not wanting to bring it to the world with the chains and bounderies that Turner children have.
A common chromosome defect is down-syndrome, yet many children are born with that. They are able to live longer, so is that the factor? The presumed lenght of life? The ability to reproduce?

I'm not basing my view on any religious beliefs, but I can't help but wonder.

And please, if any Turner-diagnosed Redditors read this, please do share your point of view and life experience!
<bot>: are you qualified to live even though you are to be born with a defect/disease which will shorten your lifespan and make you unable to reprouce?