"It is the large number of abortions due to lifestyle choice that I am unhappy about."
-And how are you substantiating this?
The Pope and the Catholic church justify their stance on abortion, since according to their doctrine life begins at the moment of fertilization, so any abortion is the termination of a human life.
This is not a definition that I would agree with.
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But i think what discomfits people the most about abortions are the late-term abortions, typically after the 20th week of gestation. But these are exceptionally uncommon, and only carried out where there would be a grave risk to the mothers health from carrying the baby to term, cases such as this one, for instance;
http://www.cbsnews.com/news/pregnant-el-salvador-woman-denied-life-saving-abortion/
In terms of whether a pregnancy or a foetus is viable outside of the womb - Almost all foetus's prior to 21 weeks will die; Almost all foetus's after 27 weeks will live. (Full term would be between 37-41 weeks) In between is the grey area.
So for those wishing to reduce the upper limit in the UK ( currently 24 weeks) - where do wish to reduce it to, and why?
We are having increasing success in maintaining a foetus outside of the womb in Paediatric Intensive Care Units, for instance - but the effort required, in terms of trained medics, 24 hour nursing care, incubators and everything else, is huge. And for those that are able to survive, their long term health is impacted; many suffer neurodevelopmental issues, others suffer other serious chronic health issues, and a substantial proportion will have a reduced life expectancy. So to say that foetuses that are born prior to 24 weeks can survive is technically true, but does not give a full picture.
Personally, I am ok with the existing limits and access for abortion.