Comparing CDC stats of abortion, still births and mortality stats. The percentages are very close. Abortion rates are dropping due to improvement in birth control and planning. Soon miscarriages will be the majority.
I see nothing that indicates miscarriages are a minority of abortions in the first world in any meaningful way (miscarriage is extremely hard to measure...my wife has had one, perhaps two, she's not even sure).
Still, even if I allowed for 2/3 of abortions being induced, it still means fully a third of them are miscarriages. I don't like the terminology used in the OP, but using the '3/4 of pregnancies end in abortion' stat still means a whole lot of them are miscarriages. Accidents. Nothing to do with how responsible or otherwise the sex was.
That is within the context I am explaining.
Sorry, don't quite follow your meaning here.
As the study says there are variable such as location and economic class, etc. In the 1st world we have better systems from medical to support to even laws. In the 3rd like many in Africa many nations only make medical reasons legal whereas in the US and many nations in the West there is no medical requirements. So an induced abortion by the parent in one nation is classified as murder not abortion thus distorting stats.
Honestly, I have no interest in arguing the toss with you on induced abortions. I'm meet suggesting that your line about 3/4 of pregnancies being irresponsible is based on you including all abortions from the OPs definition...which means miscarriages.
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There is still a quarter left which I believe covers those that could claim no fault or action as not all miscarriages are unrelated to personal action. Granted we drastic differ regarding responsibility of individual involved or at least in the case of many that are pro-choice. For example those that have had annon-medical induced abortion for financial reasons are irresponsible in my view. They fail to take into account their situation. I do not accept using birth control as a responsible response while the financial situation is the same.
For the sake of this thread, I'm not arguing that abortions are responsible. But the OP indicates 1/4 of pregnancies are viable, 3/4 are not. Of the 3/4, there are induced abortions, natural abortions (miscarriages) and stillbirths.
Doesn't equate to 3/4 of births being irresponsible, even if I allow for every abortion being irresponsible (not my view, but for the sake of this discussion let's assume that is the case)
And yes, as you said, some miscarriages have causative factors related to behaviour (eg. Drug use). But miscarriages are very common often for no clear reason at all.