Choosing Birth Control: Finding the Contraceptive That Fits You

What Is the “Best” Birth Control?

When someone asks me, “What is the best birth control?” my answer is usually:

It depends on what matters most to you.

There is no single contraceptive method that is best for every woman.

For one woman, preventing pregnancy with the highest possible effectiveness may be the priority. Another may want lighter periods. Someone else may want to avoid estrogen, avoid hormones altogether, improve acne, decrease painful periods, maintain predictable monthly bleeding, or be able to attempt pregnancy quickly after stopping contraception.

That is why contraceptive counseling should not simply begin with: “Which birth control should I put you on?” A better conversation begins with: “What matters to you?”

At Agape Life Sciences, we believe in evidence-informed healthcare: bringing together the best available research, clinical experience, biological understanding, and the individual patient’s values and goals. Understanding your options is the first step.

Understanding Perfect Use vs. Typical Use

Before comparing birth-control methods, it is important to understand two different measures of effectiveness.

Perfect-use failure rate asks: If 100 women use this method correctly and consistently for one year, approximately how many will become pregnant?

Typical-use failure rate asks: What happens in the real world, where pills are occasionally forgotten, condoms may not be used every time, patches may be changed late, or appointments for injections may be missed?

That difference is important. For example, birth-control pills are extremely effective when used perfectly. But their real-world effectiveness is lower because they require consistent action by the user. An IUD or implant requires almost nothing from the user after placement. Therefore, there is very little difference between perfect and typical use.

One useful way to think about contraception is to divide methods into three effectiveness tiers.

TIER I: HIGHEST-EFFECTIVENESS CONTRACEPTION

Typical-use failure rate: less than 1%. Tier I includes long-acting reversible contraception (LARC) and permanent contraception.

The major advantage of Tier I contraception is that it removes most of the opportunity for human error.

Hormonal IUD

Examples include Mirena, Liletta, Kyleena, and Skyla.

Hormone exposure: Primarily local progestin
Perfect-use failure: approximately 0.1–0.3%
Typical-use failure: approximately 0.1–0.4%

How It Works

Hormonal IUDs release levonorgestrel, a type of progestin, primarily within the uterus. This distinction matters. A hormonal IUD is hormonal contraception, but it does not produce the same systemic hormonal exposure as taking a birth-control pill, using the patch, or using the vaginal ring. There is some systemic absorption, but circulating hormone exposure is substantially lower. The primary contraceptive effects occur locally. Progestin thickens cervical mucus, thins the endometrial lining, and interferes with sperm movement and function. Ovulation frequently continues, particularly with lower-dose devices and later during use.

Benefits

Hormonal IUDs are among the most effective reversible contraceptives available. They can dramatically decrease menstrual bleeding, reduce painful periods, treat heavy menstrual bleeding, improve iron-deficiency anemia caused by heavy periods, provide years of contraception, avoid estrogen, and allow rapid return to fertility following removal. Some women eventually stop having periods while using a hormonal IUD. Menstrual blood is not “building up.” The progestin makes the endometrial lining very thin, so there is simply less tissue to shed.

Common Side Effects

The most common issue is irregular bleeding and spotting, particularly during the first several months. Other possible effects include cramping around insertion, acne, breast tenderness, headaches, mood changes in some users, and functional ovarian cysts.

Important Contraindications

IUD placement is generally inappropriate with current pregnancy, current pelvic infection or purulent cervicitis, a uterine cavity significantly distorted by fibroids or congenital abnormalities, unexplained vaginal bleeding requiring evaluation, or untreated cervical or endometrial cancer. Current breast cancer is an important contraindication to hormonal contraception, including the levonorgestrel IUD. Serious complications from IUD insertion are uncommon.

Copper IUD

Hormone exposure: None
Perfect-use failure: approximately 0.6%
Typical-use failure: approximately 0.8%

How It Works

Copper creates an environment within the reproductive tract that interferes with sperm movement, function, and fertilization. Because there are no hormones, the copper IUD does not intentionally suppress the hypothalamic-pituitary-ovarian axis. Ovulation and the natural hormonal cycle continue.

Benefits

The copper IUD is completely hormone-free, extremely effective, long-lasting, requires no daily action, allows rapid return to fertility after removal, and can be used by women who cannot or do not want hormonal contraception. It can also be used as highly effective emergency contraception.

Common Side Effects

The primary tradeoff is menstrual bleeding. Periods can become heavier, longer, and more painful, particularly during the first several months. For someone who already has significant heavy menstrual bleeding or severe menstrual cramps, this may be an important consideration.

Important Contraindications

The general IUD contraindications discussed above also apply.

Nexplanon: The Contraceptive Implant

Hormone exposure: Systemic progestin
Perfect-use failure: approximately 0.1%
Typical-use failure: approximately 0.1%

How It Works

Nexplanon is a small etonogestrel-containing implant placed beneath the skin of the upper arm. Unlike the hormonal IUD, Nexplanon delivers progestin systemically. Progestin does much of the contraceptive heavy lifting: the implant strongly suppresses ovulation, thickens cervical mucus, and thins the endometrium.

Benefits

One of the most effective reversible methods available; no estrogen; nothing to remember every day; long-lasting; rapid return to fertility after removal; appropriate for many women who cannot use estrogen.

Common Side Effects

The biggest issue is often unpredictable bleeding. Some women stop having periods. Others experience frequent spotting, prolonged bleeding, irregular bleeding, or unpredictable cycles. Other reported effects can include headaches, acne, breast tenderness, and mood changes. An important question is: How important is predictable bleeding to you?

Important Contraindications

Current breast cancer is an important contraindication to the implant. Significant liver disease and certain medication interactions also require individualized evaluation.

TIER II: HIGHLY EFFECTIVE BUT USER-DEPENDENT

Tier II includes combined birth-control pills, progestin-only pills, the vaginal ring, the contraceptive patch, and Depo-Provera injection. These methods can be extremely effective when used correctly, but there is a larger difference between perfect and typical use because the patient must remember to take, change, insert, or receive the medication.

Combined Birth-Control Pill

Hormone exposure: Systemic estrogen + progestin
Perfect-use failure: approximately 0.3%
Typical-use failure: approximately 7%

How It Works

Combined oral contraceptives contain estrogen and a progestin. The hormones suppress ovulation, thicken cervical mucus, and alter the endometrial lining. Progestin performs much of the contraceptive work. Estrogen contributes to suppression of the reproductive axis but also helps stabilize the endometrium and provides more predictable cycle control.

Benefits Beyond Contraception

Birth-control pills are medicine—not simply pregnancy prevention. Depending on the formulation and patient, benefits can include lighter periods, more predictable cycles, less menstrual pain, improvement in acne, reduced menstrual blood loss, menstrual suppression when desired, management of certain symptoms associated with PCOS, and reduced risk of ovarian and endometrial cancer.

The Estrogen Tradeoff

Estrogen increases thrombotic risk. The absolute risk remains relatively low for most healthy reproductive-aged women, but risk becomes more important when other medical risk factors are present. Combined hormonal contraception generally should not be used, or requires careful evaluation, in women with migraine with aura, certain histories of deep-vein thrombosis or pulmonary embolism, high-risk thrombophilias, certain cardiovascular diseases, severe or uncontrolled hypertension, smoking at age 35 or older—particularly heavy smoking—certain significant liver diseases, current breast cancer, or certain high-risk postpartum periods.

Common Side Effects

Nausea, breast tenderness, breakthrough bleeding, headaches, mood changes, and changes in libido. Many early side effects improve after the first few months.

Vaginal Ring

Hormone exposure: Systemic estrogen + progestin
Perfect-use failure: approximately 0.3%
Typical-use failure: approximately 7%

Benefits

Although the contraceptive ring is placed in the vagina, its hormones are systemically absorbed. It should not be confused with the primarily local hormonal effect of the levonorgestrel IUD. Benefits include no daily pill, predictable cycles, lighter menstrual bleeding, reduced menstrual cramping, effective ovulation suppression, and the option for continuous use in some patients.

Common Side Effects and Contraindications

Possible side effects include vaginal irritation or discharge, breast tenderness, headaches, nausea, and breakthrough bleeding. Because the ring contains estrogen, the major estrogen-related contraindications discussed for combined birth-control pills also apply.

Contraceptive Patch

Hormone exposure: Systemic estrogen + progestin
Perfect-use failure: approximately 0.3%
Typical-use failure: approximately 7%

Benefits

The patch delivers estrogen and progestin through the skin. Benefits include weekly rather than daily administration, predictable cycles, no daily pill, and similar noncontraceptive benefits to other combined hormonal contraceptives.

Common Side Effects and Contraindications

Possible side effects include skin irritation, breast tenderness, headaches, nausea, and breakthrough bleeding. Because the patch contains estrogen, estrogen-related cardiovascular and thrombotic contraindications apply. Body weight and BMI may also influence the effectiveness or appropriateness of particular patch formulations.

Progestin-Only Pill

Hormone exposure: Systemic progestin
Perfect-use failure: approximately 0.3%
Typical-use failure: approximately 7%

How It Works

Progestin-only pills contain no estrogen. Different progestin-only pills work somewhat differently, so they should not all be treated as interchangeable. Progestin thickens cervical mucus, alters the endometrium, and suppresses ovulation to varying degrees depending on the formulation.

Benefits

No estrogen; reversible; no device or procedure; usable by many women who should avoid estrogen; can be appropriate during breastfeeding; rapid return to fertility.

Common Side Effects and Contraindications

Irregular bleeding, acne, breast tenderness, headaches, and mood changes can occur. Adherence and timing can be particularly important with some formulations. Current breast cancer and certain significant liver diseases are important contraindications.

Depo-Provera

Hormone exposure: Systemic progestin
Perfect-use failure: approximately 0.2%
Typical-use failure: approximately 4%

How It Works

Depo-Provera, or DMPA, is an injection generally administered every three months. It strongly suppresses the hypothalamic-pituitary-ovarian axis and therefore suppresses ovulation. It also thickens cervical mucus and thins the endometrial lining.

Benefits

No estrogen, no daily medication, substantial reduction in menstrual bleeding for many users, improvement in menstrual cramps, and eventual amenorrhea in many women. It can be useful when menstrual suppression is desirable.

Important Tradeoffs

Return to fertility may be delayed after the final injection. This does not mean DMPA causes infertility; rather, the medication can remain biologically active for some time following the last injection. Other considerations include irregular bleeding, possible weight gain, headaches, mood symptoms, and reversible decreases in bone mineral density during use. Bone health deserves consideration, particularly in adolescents and younger women who are still accumulating peak bone mass.

TIER III: USER-DEPENDENT NON-HORMONAL CONTRACEPTION

These methods avoid systemic hormones but require substantially more participation from the user.

External Condom

Hormone exposure: None
Perfect-use failure: approximately 2%
Typical-use failure: approximately 13%

Benefits and Tradeoffs

Condoms have one major advantage that deserves emphasis: they reduce transmission of sexually transmitted infections. IUDs, implants, pills, patches, rings, and injections do not. For people at risk of sexually transmitted infections, condoms can therefore be used in addition to another contraceptive method. This is sometimes called dual-method protection.

Internal Condom

Hormone exposure: None

Benefits and Tradeoffs

The internal condom is non-hormonal, user-controlled, a physical barrier to sperm, and capable of providing some protection against sexually transmitted infections. Pregnancy rates with typical use are higher than with LARC and hormonal contraception, making correct use with every sexual encounter important.

Diaphragm

Hormone exposure: None

Benefits and Tradeoffs

A diaphragm is a non-hormonal barrier placed over the cervix and generally used with contraceptive gel or spermicide. Benefits include no systemic hormones, user control, and use only when needed. The tradeoff is considerably greater dependence on correct and consistent use.

Withdrawal

Hormone exposure: None
Perfect-use failure: approximately 4%
Typical-use failure: approximately 20%

Benefits and Tradeoffs

Withdrawal illustrates the difference between biological efficacy and real-world effectiveness particularly well. It requires recognizing ejaculation and withdrawing correctly every time. Withdrawal provides no protection against sexually transmitted infections.

Fertility-Awareness-Based Methods

Hormone exposure: None
Failure rate: varies substantially by method and adherence

Benefits and Tradeoffs

Fertility-awareness methods may incorporate menstrual-cycle tracking, cervical mucus changes, basal body temperature, and other physiological indicators of fertility. Couples avoid unprotected intercourse during the fertile window. Effectiveness varies considerably depending on the particular method, quality of education, cycle regularity, and adherence. Typical-use failure estimates can approach approximately 20 pregnancies per 100 users per year in some datasets. If avoiding hormones is a patient’s priority and she understands the effectiveness tradeoff, that preference deserves to be part of shared decision-making.

QUICK COMPARISON

Failure rates are estimates and can vary somewhat among studies, populations, formulations, and contraceptive guidelines.

Systemic Hormones vs. Primarily Local Hormones

Not every hormonal contraceptive produces the same hormonal exposure. That distinction is often lost in conversations about birth control.

No Hormones

Copper IUD; condoms and barrier contraception; fertility-awareness methods; withdrawal.

Primarily Local Progestin Exposure

Hormonal IUD. There is some systemic absorption, but the primary contraceptive activity and highest hormone exposure occur within the reproductive tract.

Systemic Progestin

Nexplanon implant; progestin-only pill; Depo-Provera.

Systemic Estrogen + Progestin

Combined birth-control pill; vaginal ring; contraceptive patch.

This distinction becomes particularly important when a woman tells me: “I don’t want hormones.” My next question should be: “Tell me what concerns you about hormones.” Maybe she previously experienced mood symptoms on a combined pill. Maybe she is concerned about estrogen and blood clots. Maybe maintaining ovulation is important to her. Maybe she wants to minimize systemic hormone exposure. Or perhaps she simply prefers a completely non-hormonal approach. Those are different concerns—and they can lead to very different contraceptive choices.

Effectiveness Is Not the Only Outcome That Matters

If pregnancy prevention were the only consideration, the conversation would be relatively simple: choose a Tier I method. But women aren’t statistics. One patient may say, “Pregnancy right now would be devastating. I don’t want to think about birth control every day.” An IUD or implant may fit her priorities extremely well. Another may say, “I don’t mind taking a pill every day, but I want predictable periods and I want my acne to improve.” A combined oral contraceptive may better align with her goals. Another may say, “I absolutely do not want systemic hormones.” The copper IUD might be an excellent option. And another may say, “I have very heavy, painful periods. I don’t want to become pregnant, and I would love to bleed less.” A levonorgestrel IUD may address both concerns.

The question isn’t simply: Which method has the lowest failure rate? The better question is: Which method provides this individual woman with the best balance of effectiveness, benefits, risks, convenience, and quality of life?

Don’t Forget STI Protection

Pregnancy prevention and sexually transmitted infection prevention are two different goals. Most contraceptives do not protect against sexually transmitted infections. External condoms—and to some extent internal condoms—provide STI protection. Someone using an IUD, implant, pill, patch, ring, or injection who is at risk for STI exposure should therefore consider condoms as well.

“Safe” vs. “Unsafe” Is Usually Too Simple

Online discussions frequently describe contraceptives as either “safe” or “dangerous.” Medicine is rarely that simple. The CDC’s U.S. Medical Eligibility Criteria for Contraceptive Use uses four categories: Category 1: No restriction. Category 2: Benefits generally outweigh theoretical or demonstrated risks. Category 3: Risks usually outweigh benefits. Category 4: Unacceptable health risk—the method should not be used. A medical condition that prevents someone from safely using an estrogen-containing contraceptive may have little or no effect on her ability to use a progestin-only or non-hormonal method. Migraine with aura is a good example. Combined estrogen-containing contraception is generally avoided, but that does not mean the woman has no birth-control options.

Choosing Birth Control Should Be Personal

Highly effective contraception deserves to be discussed. So do side effects. So do potential benefits. So do long-term considerations. And most importantly, so do the patient’s goals and preferences. The woman sitting across from us is ultimately the person who has to live with that choice. Birth control is not one-size-fits-all.

Choosing contraception involves more than asking which method prevents the most pregnancies. We should understand how each method works, where it shines, what risks it carries, and what tradeoffs come with it. Then we bring together evidence, biology, clinical experience, medical history, lifestyle, reproductive goals, and patient values. That is what evidence-informed shared decision-making should look like. And that is the conversation women deserve.

Medical Disclaimer

This article is intended for educational purposes and does not constitute individualized medical advice. Contraceptive recommendations can change substantially based on medical history, medications, blood pressure, smoking status, migraine history, cardiovascular and thrombotic risk, cancer history, postpartum status, breastfeeding, reproductive goals, and other factors. Discuss your individual risks and benefits with your healthcare professional before starting or changing contraception.

Dr. Jackson Sobbing, DO, FACOG
Board-Certified Obstetrician-Gynecologist
Associate Clinical Professor, University of Kansas School of Medicine
Founder, Agape Life Sciences

Agape Life Sciences — Evidence-informed education for women’s health, hormones, longevity, and healthspan.