That's why there's abstinence, works every time it's tried.
Really?
Exhibit #1 “Mary, Mother if Jesus”...
/s
Until I was married, I didn’t want to “be pregnant” either, or be a father. That’s why I used the most effective contraceptive ever created:
My personality.
Seriously, anyone who “gets pregnant” without wanting to be is highly irresponsible. And not the sort of person I’d want to be in a relationship with.