This question is very closely linked to my other question here: culture changes to reliable and mandated birth control used from puberty until ready to conceive
Lets say that a reliable birth control is mandated in the near-future (where birth control is safer and more reliable then now). The birth control can be easily deactivated when someone is ready to have a child, but it ensures that pregnancy rarely occurs unless the mother intended for it to happen.
The question above asks about the effect of birth control in general to sex and culture. For this question I want to look at a more specific area, what is the effect of a child never (well, very rarely) being born to a mother who did not plan to conceive?
What happens when you never have to deal with an unwanted baby? How would this effect things like child services, and adoption? How would the society look half a generation later when you have a generation of now-adults that consists of no-one born to a parent that never wanted them?
I know some studies have suggested crime rate dropped due to legalizing of abortion avoiding children born to parents that didn't want them who, supposedly, would be more likely to engage in crime due to being raised in the sort of home life where your unwanted and/or unloved. These studies are controversial due to the fact that their about abortion, but would similar, or even more drastic, effects occur where birth control prevented these pregnancies from occurring?
If a change in society would occur when the first generation of all-planned children grow up how big, or small, might the change be? would there be any negative results of it?
Some degree of social services would no doubt have to exist, but would it and adoption look any different?
Presumably the total population size (or growth) will be effected to some degree, though I'm not sure if it would be a noticeable difference. If it would be then what effects would the smaller population density have?