How to choose birth control based on your health history

You have a health history that's yours alone — and it should drive your birth control decision, not the other way around.

Yet most people walk into a clinic knowing only what they've heard from friends or seen on social media. That's a risky way to choose a method that you might use for years.

The CDC publishes something called the U.S. Medical Eligibility Criteria for Contraceptive Use (US MEC). It's the gold-standard guide that tells clinicians exactly which methods are safe for people with specific conditions. The 2024 update added new guidance for chronic kidney disease, updated recommendations for obesity and postpartum use, and included newer contraceptive formulations.

Here's how to use your own health history to find the right fit.

Start with your cardiovascular risk

Combined hormonal contraceptives — the pill, the patch, and the ring — contain estrogen. For most people that's fine. But if you have certain conditions, estrogen raises your risk of blood clots and stroke.

The CDC classifies these as conditions where combined methods should not be used:

• Migraine with aura at any age. The American Migraine Foundation notes that estrogen-containing birth control may increase stroke risk in people who experience aura with their migraines.
• History of deep vein thrombosis or pulmonary embolism, unless you're on anticoagulant therapy and stable.
• Smoking and age over 35. If you smoke and are 35 or older, the pill is not recommended.
• Uncontrolled hypertension or vascular disease.
• History of breast cancer.

If any of these apply to you, progestin-only methods (the mini-pill, implant, hormonal IUD, or shot) or non-hormonal options (copper IUD, condoms) are safer choices.

Match the method to your condition

Different health conditions point to different best-fit methods. Here's a quick guide based on the US MEC framework:

Heavy or painful periods. Hormonal IUDs (levonorgestrel-releasing) often reduce bleeding by up to 90% after the first year. The copper IUD can make periods heavier — so if you already deal with heavy flow, skip it.

PCOS or endometriosis. Hormonal methods that provide continuous progestin — the implant, hormonal IUD, or the shot — can help manage symptoms while providing contraception.

Breastfeeding. Progestin-only methods are preferred. The CDC recommends waiting at least 21 days postpartum before starting combined hormonal methods, and longer if you're breastfeeding.

Obesity (BMI 30 or higher). The implant and IUDs maintain full effectiveness regardless of weight. The pill, patch, and ring may be less reliable at higher body weights.

Sickle cell disease. Progestin-only methods are recommended because they can reduce pain crises. The copper IUD is also a safe option.

Know the effectiveness numbers — honestly

Effectiveness matters, but only if the method fits your life.

Long-acting reversible contraceptives (LARCs) — IUDs and the implant — are the most effective options because there's nothing to remember. The implant and hormonal IUDs have typical-use failure rates under 1%. The copper IUD is close behind.

The pill, patch, and ring are 91–93% effective with typical use. That gap between perfect use (over 99%) and typical use exists because people miss pills, lose patches, or insert rings late.

Condoms are about 87% effective with typical use. They're the only method that also protects against STIs.

Your 4-step checklist for the appointment

Walk into your next visit prepared. Here's what to do:

1. List your conditions. Write down everything: migraine (with or without aura), blood clot history, high blood pressure, liver disease, depression, PCOS, endometriosis, and any medications you take regularly.
2. Note your smoking status and age. If you're over 35 and smoke, that changes the options.
3. Think about your period. Do you want lighter periods? Heavier? Do you want a period at all? Hormonal IUDs and the implant often reduce or eliminate bleeding.
4. Ask about LARCs first. If you want maximum effectiveness with minimal daily effort, start the conversation with IUDs and the implant.

Quiz: Test your knowledge

Before you go, check whether you can spot the right answer.

Which birth control method has a typical-use effectiveness rate above 99%?

• A. The birth control pill
• B. The hormonal IUD
• C. The contraceptive patch

How the Resident Expert Can Help

Making sense of the CDC's 126-page clinical guidance isn't something you should have to do alone. Dr. Jill at Your Cervix translates complex OB/GYN evidence into clear, practical guidance that helps patients and providers make informed decisions. Led by Dr. Jill Palko, a board-certified OB/GYN with years of clinical experience, the practice specializes in physician-led medical writing and health communication that puts accuracy and clarity first. Whether you're developing patient education materials or need expert review of clinical content, Dr. Jill at Your Cervix delivers the grounded, evidence-based perspective this decision deserves.