What advice should be given to a 24-year-old female who has missed her last two oral contraceptive pills?

When a woman misses two oral contraceptive pills, the appropriate action is to double the dose of the current and the next day's pills and continue using a barrier method for the remainder of the cycle. This approach is correct because missing two consecutive pills can significantly increase the risk of breakthrough ovulation. By taking two pills on the day the missed doses are realized, the efficacy of the contraceptive is partially restored.

Additionally, using a barrier method, such as condoms, offers extra protection while hormone levels are reestablished to ensure that she remains protected against unintended pregnancy for the rest of the cycle. It's essential for her to maintain consistent timing with the pills moving forward to improve efficacy.

The other options do not effectively address the specific situation of missed pills in this context, particularly the immediate need to restore contraception and minimize the risk of pregnancy.