Missed the 72-Hour Cutoff? the Hour-by-Hour Guide to Emergency Contraception
Q1: Can I take two Plan B pills at once if I weigh over 165 pounds or passed 72 hours?
A1: Medical organizations do not recommend doubling the dose of Plan B. Clinical trials show that taking 3 mg of levonorgestrel increases side effects like nausea and vomiting without significantly restoring the pill's ability to prevent ovulation in higher weight brackets. Securing Ella or a copper IUD is the clinically validated path.
Q2: How do I know if Plan B worked?
A2: The only definitive indicator is the arrival of your next menstrual period or a negative pregnancy test taken 21 days after the unprotected encounter. Light spotting or nausea within a week of taking the pill is a common hormonal side effect, not proof of efficacy.
Q3: Does taking emergency contraception ruin future fertility?
A3: No scientific evidence links levonorgestrel or ulipristal acetate to future fertility problems. These compounds exit your metabolic system within several days. Your natural fertility cycle returns during the subsequent month, which is why ongoing birth control remains necessary immediately after your cycle resets.