How Long Does Plan B Delay Your Period?

Plan B can delay your period by up to 7 days, though most women experience their next period within 3 weeks of taking it. The levonorgestrel in Plan B disrupts your normal ovulation cycle, which can shift your menstrual timing. About 13% of women experience a delay of more than 7 days, while others may start their period earlier than expected. The delay depends on when you took Plan B during your cycle - taking it closer to ovulation typically causes more significant timing changes. If your period is more than a week late after taking Plan B, consider taking a pregnancy test to rule out pregnancy.

Related Questions

• Can Plan B make your period heavier or lighter?

• What are the signs Plan B didn't work?

• How effective is Plan B within 72 hours?

• When should you take a pregnancy test after Plan B?

Related Articles

Plan B Side Effects: What to Expect After Emergency Contraception

Learn about common and rare side effects of Plan B, including changes to your menstrual cycle, nausea, and breast tenderness. This guide helps you understand what's normal after taking emergency contraception.

Emergency Contraception Options: Plan B vs Other Methods

Compare Plan B with other emergency contraceptive options like ella and copper IUDs. Understand effectiveness rates, timing requirements, and which method might be best for your situation.

Menstrual Cycle Changes After Emergency Contraception

Discover how emergency contraceptives can affect your period timing, flow, and symptoms. This article explains what menstrual changes are normal and when to seek medical attention.

Learn More

• How Long Does a Strep Test Take at Urgent Care?

• How Long Does Zepbound Stay in Your System?