What are the odds that that a young woman will get pregnant during her first year on the Pill?
The answer is: At typical rates of contraceptive failure, nine out of 100 of these young women will get pregnant. (Actually, that's the average for all Pill users; young users probably have higher failure rates.) Among condom users, 17 young women will get pregnant for every 100 who rely on this method (IUD's and implants are the most successful methods in "typical use"). That's just the risk in the first year. If you spend ten years being unmarried and sexually active, the odds you will get pregnant, or get someone pregnant, are quite substantial.
Newsflash: Sex makes babies.