Well, if you don't want to be pregnant...
Don't get that way!
There is all that "sex education", now, from well before puberty, not just 10th grade 'health class"
Odd that before all the myriad modern ways to avoid becoming pregnant, people managed to avoid that, but now that there are a half dozen ways to NOT become pregnant, people insist that a 600,000 babies a year need to be killed, mostly for convenience.