Am I Protected Yet? (Backup Calculator)

Most hormonal methods need a little time to reliably suppress ovulation or thicken cervical mucus. If you begin a method during the first few days of your period, ovulation for that cycle hasn't happened yet, so you're covered from the start. If you begin at another point in your cycle — a 'quick start' — the method may not stop an egg from being released that cycle, so you use a backup like condoms for a short window until it's fully working. The one exception is the copper IUD, which works immediately because it doesn't rely on hormones.

It depends on the method. For combined methods (pill, patch, ring), the implant, the shot, and the hormonal IUD, the CDC advises 7 days of backup if you didn't start during the first few days of your period. The traditional progestin-only 'mini-pill' needs only 2 days. The drospirenone progestin-only pill (like Slynd) needs 7 days. The copper IUD needs none — it's effective immediately. This tool applies those exact windows to what you tell it.

The first day of menstrual bleeding. The CDC's windows are counted from that day. For most methods, starting within about 5 days of the first day of bleeding means no backup is needed; for the shot and the hormonal IUD it's within 7 days, and for the drospirenone mini-pill it's within 1 day. If you started at any other time in your cycle, or you're not sure, it's safest to assume you need the backup window and use it.

If you had unprotected sex during the backup window (or before starting), you could be at risk of pregnancy, and emergency contraception is worth considering — it's most effective the sooner it's taken. Going forward, use your backup method (condoms) for the full window this tool shows, and keep taking or using your method as directed. If you're unsure, a clinician or pharmacist can help you decide about emergency contraception quickly.

No — only condoms (external or internal) reduce the risk of sexually transmitted infections. Hormonal methods, IUDs, the implant, and the shot are excellent at preventing pregnancy but offer no STI protection. Many people use condoms alongside their method for 'dual protection,' which conveniently doubles as your backup while a new method kicks in. If STIs are a concern, keep using condoms and stay current on testing.

Yes. This tool runs entirely in your browser. Your answers are used on your own device and are never sent to a server, saved, or shared — close the tab and they're gone. It's general educational information based on CDC guidance; it isn't a prescription or medical advice and can't replace your clinician or the instructions that came with your method.