Leaving aside the issue of whether some forms of contraception have post-fertilisation effects, there is a debate about whether contraception makes people more or less likely to have abortions.
I think the arguments go something like this. Anti-contraception pro-lifers* claim that contraception encourages people to be in denial about the connection between sex and pregnancy. This means that people are more likely to have sex in situations where they definitely don't want to get pregnant and if they do get pregnant, they're more likely to view it as a 'mistake' which should be 'corrected' by abortion. This may seem far fetched, but there is evidence from other areas of life that sometimes actions to improve the safety are outweighed by an increase in risk taking. I don't wear a cycle helmet, in part because there is some evidence that they don't improve your overall safety as drivers drive more dangerously around cyclists wearing helmets because they aren't viewed as as vulnerable.
The pro-contraceptive argument is that, even if people are more likely to have an abortion if they get pregnant, the decrease in the number of unplanned pregnancies when people use contraception are so high that they reduce the number of abortions overall.
So, I think this needs to be looked at empirically. I think being a social scientists can help one make more sense of the correlation and causation. One thing said by anti-contraception advocates is that a large proportion of the women who have abortions were using contraception whereas very few were practising NFP, FAM or LAM. I don't think that this correlation results in a causation. Most people who practice NFP are devout Roman Catholics and they'd be pretty unlikely to have an abortion. So in this case, rather than the use of contraception causing abortion it's more that the lack of contraceptive use and the lack of abortion are both caused by the Roman Catholicism.
A pro-contraception argument is that among developed countries with legal abortion, the countries with the lowest abortion rates are the ones where contraception is most easily available and sex education is most comprehensive, such as the Netherlands. A contrasting argument is that abortion rates have risen in England and the US, even as contraceptive availability has increased.
Thinking about this I'm drawn toward a tentative conclusion. I think that ceteris paribus, more access to contraception reduces the number of abortions, because it dramatically reduces the number of unplanned pregnancies. However, I wonder whether the availability of convenient contraception has led to changes in cultural attitudes to sex and children, which in turn makes people more likely to have abortion because they have more sex and are less willing to accept unplanned children.
*This ignores other arguments against contraception just that they cause more abortions.
**This ignores wider reproductive justice issues.
I think the arguments go something like this. Anti-contraception pro-lifers* claim that contraception encourages people to be in denial about the connection between sex and pregnancy. This means that people are more likely to have sex in situations where they definitely don't want to get pregnant and if they do get pregnant, they're more likely to view it as a 'mistake' which should be 'corrected' by abortion. This may seem far fetched, but there is evidence from other areas of life that sometimes actions to improve the safety are outweighed by an increase in risk taking. I don't wear a cycle helmet, in part because there is some evidence that they don't improve your overall safety as drivers drive more dangerously around cyclists wearing helmets because they aren't viewed as as vulnerable.
The pro-contraceptive argument is that, even if people are more likely to have an abortion if they get pregnant, the decrease in the number of unplanned pregnancies when people use contraception are so high that they reduce the number of abortions overall.
So, I think this needs to be looked at empirically. I think being a social scientists can help one make more sense of the correlation and causation. One thing said by anti-contraception advocates is that a large proportion of the women who have abortions were using contraception whereas very few were practising NFP, FAM or LAM. I don't think that this correlation results in a causation. Most people who practice NFP are devout Roman Catholics and they'd be pretty unlikely to have an abortion. So in this case, rather than the use of contraception causing abortion it's more that the lack of contraceptive use and the lack of abortion are both caused by the Roman Catholicism.
A pro-contraception argument is that among developed countries with legal abortion, the countries with the lowest abortion rates are the ones where contraception is most easily available and sex education is most comprehensive, such as the Netherlands. A contrasting argument is that abortion rates have risen in England and the US, even as contraceptive availability has increased.
Thinking about this I'm drawn toward a tentative conclusion. I think that ceteris paribus, more access to contraception reduces the number of abortions, because it dramatically reduces the number of unplanned pregnancies. However, I wonder whether the availability of convenient contraception has led to changes in cultural attitudes to sex and children, which in turn makes people more likely to have abortion because they have more sex and are less willing to accept unplanned children.
*This ignores other arguments against contraception just that they cause more abortions.
**This ignores wider reproductive justice issues.