The chances of becoming pregnant 3 days after ovulation are pretty high! Generally, 3 days before ovulation and 3 days after ovulation are the most fertile. Unless you are intending to become pregnant, using contraception, such as Nexplanon, IUD or birth control pills, will offer excellent protection against an unintended pregnancy. In most states, beginning at age 13, women can seek contraception without parental permission. Latex condoms should be used with any birth control to protect against STD infections. Your health care provider will provide you with much more information on birth control options and STD protection.