No,there is very little abortion,if one want have a baby then he will stop using condom,most abortion happenned among yong girls when they conceive at accident~~
There is not whole one-child policy,when the mother is more than 30 years old she can have the second baby;
More important,the concept of people has been changed,we don't want to have many babies,bcs the high cost of raising a baby:Milk powder, health, education from kindergarten to university, housing and so on;30 years ago,we only feed the baby till he married,the cost is very low,but now,we have to provide well level of life,well education and so on.Most people only want to have one or two babies,but poorer the people more babies they want,a Vicious circle