If you miss the contraception bit or if for some reason it fails, there are always abortions. However, even if it's legal in your jurisdiction, for many, it's traumatic and even if it wouldn't normally be, society generally makes it that way
Morning after pills, aka plan B, is hardly traumatic. Mifepristone (RU-486) is not that big a deal if you act early. The key here is you want to act as early as possible.
It is the people who dawdle around and wait until they are mid to late stage pregnancy who have issues.
Having babies is tricky. It took us six months once we decided on the first. 2 years on the second and bang on the first try for the third. There were at least 2 possibly 3 natural abortions as well. Natural abortions during the first trimester are why people usually don't usually announce until they start showing.
That was after 23 and 16 years respectively of being sexually active without having any trouble with unwanted pregnancies.
Ironically both our sisters got knocked up around 16. Both had their kids. One kept him and the other put her up for adoption and all involved went on to have perfectly normal lives and families.