1. Make it a cultural expectation that respectable and responsible people have some means to support a family and get married before they have kids.
2. Make it a cultural expectation that moral and responsible people put the welfare of the kids first meaning they give them every opportunity. That would include a loving mom and dad in the home whenever possible.
3. Make it a cultural expectation that moral and responsible people accept personal responsibility and hold themselves and others accountable for the choices they make. We need to stop rewarding poor choices and punishing good ones.
THAT is how you solve the problem.
Americans have had a culture of "personal responsibility" now for decades. That doesn't seem to be working. And your "cultural expectations" sound like something out of the 1950's. It is completely unrealistic to expect people to go back to behaviours that really didn't work well for them. What you fail to recognize is that obtaining an abortion is taking personal responsibility for one's actions.
People do put their children's welfare first, but you and I might disagree as to what that is. I absolutely do not believe that every child need to be raised by two loving parents, although that would be ideal. I would rather a child be raised in a loving home with access to lots of family than with two adults who stay together for the sake of the children.
You have a very idealized vision of the past. It was not always the way it seemed or the way you remember it. Women were not equals in the home or the workplace and had fewer options than they do today. I certainly wouldn't want to be an adult woman living in the 50's - no birth control, expected to stay at home and raise the children, always deferring to my lord and master. No thank you. Women by the millions revolted and demanded rights and choices. That should tell you in the plainest possible way, that the social constructs of the 1950's were not working for many women.
Today, we have rights and choices. You don't like where those rights and choices have led us, and I admit, there are some things that grate on my last nerve, but we're not going back to what you perceive as the good old days, because they really weren't that good.
Canada's abortion rate is substantially lower than that of the United States. In 2011, there were 1,210,880 abortions performed in the US versus 70,549 in Canada. Considering that the population of the US is 10X what Canada's is, it's to be expected that you would have more, but even if you take the number of Canadian abortions times 10, the US abortion rate is nearly 60% higher than Canada.
In Canada, abortion is a matter between a woman and her doctor, which is as it should be. There is no cost for the woman to have an abortion because it's covered by her government funded health plan. She can opt to have the abortion in a free-standing, privately owned abortion clinic (only in larger cities) or at her local hospital. Her choice. And teenagers can get abortions without their parents' knowledge or permission.
Sex education starts in senior public school and is a mandatory part of health class and it is on the exam. Your parents cannot sign you out of sex education. Condoms are available in the high school washrooms. Birth control pills are easily obtainable and your doctor cannot tell your parents about them.
Women who become pregnant have access to many programs which will help support them when their children are small, retrain them when they are ready to join the workforce (usually after the kids are in school), supplement their income until they can support their families on their own. Because of these programs, there is less economic incentive for women to have abortions.
THAT is how you reduce abortions.
Abortions statistics - countries compared - NationMaster
The abortion statistics for all of the social democracies are all similarly low. We welcome children, and we try to help young families who are struggling, make a better life for themselves. A far cry from the "baby killing liberals" some on this board keep trying to portray us as.