You can safely take Plan B multiple times a year without harming long-term fertility, but frequent use is a sign you’d benefit more from reliable ongoing birth control. Irregular periods, higher weight, and confusion between Plan B and abortion pills are common worries — but emergency contraception remains safe and distinct from abortion medication.

Emergency contraception is still considered safe if you have PCOS, endometriosis, or irregular cycles, and there’s no evidence it makes future fertility problems worse. Your underlying condition drives long-term fertility risk, not a couple of EC pills.

Emergency contraception can absolutely delay ovulation and make your next period early, late, heavier, or lighter — but it’s a short-term hormone disruption, not a permanent reset of your cycle. Most people are back to their usual rhythm within 1–2 cycles.

Irregular or heavier periods after IUD removal, years on birth control, or stopping a hormonal IUD or implant don’t mean you’ve “ruined” your fertility. Modern evidence shows these methods don’t cause infertility; they can mask underlying issues, and most cycles normalize within a few months, with IUDs considered safe even if you haven’t had kids yet.

Copper IUDs, hormonal IUDs, and the implant are all meant to be fully reversible, with no proven long-term damage to fertility. They differ mainly in how they affect your cycle while you use them and how quickly things feel “normal” after removal; the real fertility threats are infections, severe pain, or major cycle changes you ignore, not the specific device itself.

IUDs themselves don’t cause infertility in healthy users. Big studies show ex-IUD users get pregnant at the same rates as people who never used them; the real fertility threat is untreated infections like chlamydia or gonorrhea that lead to PID and scarring. Serious complications (like perforation) are rare and usually don’t harm long-term fertility when treated.

Long-term birth control use (pill, IUD, implant, ring, patch) does not damage your fertility. It temporarily pauses ovulation or makes the uterus less friendly to sperm, and for most people fertility returns within weeks to a few months after stopping—except the Depo shot, which can delay things 9–18 months without causing permanent harm.

Your fertility doesn’t need a “reset” after IUD removal. Both copper and hormonal IUDs are fully reversible, and you can potentially get pregnant in the very first cycle once the device is out. Cycles may feel a bit weird for a few months, but major studies show no long-term hit to fertility compared with people who never used IUDs.

Taking Plan B or other emergency contraception a few times in your 20s won’t secretly destroy your fertility. It’s a short burst of hormones that temporarily delays ovulation in that one cycle, without killing eggs, aging your ovaries, or permanently changing your ability to get pregnant later.