Can Birth Control Pills Cause Hair Loss? What Women Need to Know

Written by Dr Heng Jiacheng, MBBS, Diploma in Aesthetic Medicine (AAAM)Associate Member, ISHRS · Member, AAHRS Insights from a Singapore-based hair-loss physician

Quick answer: Yes. Birth control pills can trigger hair loss in some women - but certain types of birth control pills may also improve hormonally driven thinning.

The effect depends on the formulation, the androgenic activity of its progestin, when the pill was started or stopped, and the type of hair loss involved. Birth control pills, medically known as oral contraceptive pills or OCPs, contain hormones that can influence the normal hair-growth cycle. Their effect on hair is not the same for every woman or every formulation.

Two patterns are particularly important: telogen effluvium, which causes sudden diffuse shedding, and female-pattern hair loss, which causes gradual thinning and follicular miniaturisation.

These conditions look different, develop on different timelines and require different management.

How Can Birth Control Pills Cause Hair Loss?

Oral contraceptive pills may affect hair through two main pathways.

1. Telogen effluvium after starting or stopping the pill

Telogen effluvium is a temporary form of diffuse hair shedding caused by a disruption to the normal hair-growth cycle.

Starting, stopping or changing a birth control pill may act as a physiological trigger. Stopping a combined oral contraceptive pill removes its estrogenic influence, which may cause a larger-than-usual number of hairs to enter the resting phase at around the same time.

The shedding does not normally begin immediately. It commonly becomes noticeable two to three months after the hormonal change.

Modern combined pills contain considerably lower estrogen doses than older formulations, but telogen effluvium can still occur after a significant hormonal transition.

The reassuring news is that telogen effluvium is usually temporary once the trigger has settled. Visible density, however, may take six to twelve months to recover because hair grows slowly.

Read more: What is normal daily hair shedding?

2. Female-pattern hair loss linked to a more androgenic pill

Some progestins have greater androgenic activity than others.

Androgens can contribute to follicular miniaturisation in genetically susceptible women. Over time, affected follicles produce progressively finer and shorter hairs.

This is known as female-pattern hair loss, or female androgenetic alopecia.

Unlike telogen effluvium, female-pattern hair loss usually presents gradually. Common signs include:

• Widening of the central part

• Reduced density over the crown or top of the scalp

• A smaller ponytail

• Increasing scalp visibility under bright light

• Finer hairs within the affected area

• Relative preservation of the frontal hairline

  
  

A contraceptive containing a more androgenic progestin may aggravate an existing tendency towards pattern hair loss in some women. It does not mean that everyone using that contraceptive will lose hair.

Hormonal changes may also unmask pattern hair loss that was already developing. In these cases, contraception may be one contributor rather than the sole cause.

Can Birth Control Pills Improve Hair Loss?

Yes. Certain combined oral contraceptives may help women whose thinning is associated with androgen excess.

The estrogen component of a combined pill can:

• Increase sex hormone-binding globulin, or SHBG

• Reduce the amount of biologically available free testosterone

• Counter some androgenic effects of the progestin

• Support a hormonal environment more favourable to the hair-growth phase

  
  

This may be relevant in women with polycystic ovary syndrome or other features of hyperandrogenism, such as irregular periods, acne or increased facial hair.

However, the evidence for treating female-pattern hair loss with a contraceptive alone is limited and inconsistent. Combined pills are not universal hair-growth treatments, and minoxidil remains a more established treatment for female-pattern hair loss.

In a randomised study comparing topical minoxidil with cyproterone acetate plus ethinylestradiol, minoxidil performed better overall in women without other signs of hyperandrogenism.

The antiandrogen regimen appeared more helpful in women with features suggesting androgen excess.

The right treatment therefore depends on the cause of the thinning - not simply whether a contraceptive is labelled “antiandrogenic.”

Which Birth Control Pills Are More Androgenic?

The overall hormonal effect depends on the specific progestin and its dose.

Progestin	General androgenic profile	Practical interpretation
Levonorgestrel or norgestrel	Relatively more androgenic	May be less suitable for some women with androgen-sensitive symptoms, although most users do not develop hair loss
Norethisterone or norethindrone	Varies with dose and formulation	Should not be placed into one universal risk category
Desogestrel, norgestimate or gestodene	Lower androgenic activity	Developed partly to reduce androgen-related effects
Drospirenone	Antiandrogenic activity	May benefit acne and other androgen-related symptoms in appropriate patients
Cyproterone acetate	Antiandrogenic	Has important safety restrictions and should not be selected casually as a hair treatment

This table should not be used to choose or change contraception without medical advice.

A pill with lower androgenic activity is not automatically the safest or best option. Different combined contraceptives carry different risks, including venous thromboembolism. The patient’s age, smoking status, migraine history, blood pressure, personal and family history of blood clots, and other medical factors must be considered.

An important Singapore-specific note

Cyproterone acetate with ethinylestradiol was previously used for androgen-dependent conditions.

However, Singapore’s Health Sciences Authority concluded that there was insufficient evidence of benefit for androgenetic alopecia relative to its thromboembolic risk.

In my clinical practice, patients who are already on OCPs for contraception and also have hairloss I counsel them on switching to an option that helps their hair as well.

What About Other Hormonal Contraceptives?

Birth control pills are not the only hormonal contraceptives associated with reports of hair loss. Hormonal IUDs and contraceptive implants release progestins without an estrogen component, although their doses, delivery and systemic hormonal effects differ from oral contraceptive pills.

Can hormonal IUDs cause hair loss?

Hair loss has been reported with levonorgestrel-releasing hormonal IUDs, but it appears to be uncommon and the evidence is limited.

One older post-marketing surveillance study estimated a cumulative alopecia incidence of approximately 0.33%, although the confidence interval was wide and the study cannot tell us precisely how often an IUD directly causes hair loss.

Hormonal IUDs primarily act within the uterus, but a proportion of levonorgestrel still enters the bloodstream. A systemic effect is therefore biologically possible.

If hair loss begins after IUD insertion, it remains important to investigate other common explanations, including:

• Iron deficiency

• Thyroid dysfunction

• Recent pregnancy

• Weight loss

• Illness or fever

• Psychological stress

• Female-pattern hair loss

  
  

Timing alone does not prove causation.

In my practice, I have observed a possible association between early-onset female pattern hair loss and the use of hormonal IUDs in some patients. However, correlation does not establish causation, and this remains a clinical observation rather than evidence of a causal relationship.

Can contraceptive implants cause hair loss?

Alopecia is a recognised but less frequently reported adverse effect of progestin implants.

However, there is no reliable universal percentage that can be applied to every implant and every patient. Reported rates vary across products, studies and methods of collecting adverse events.

Because implants do not contain estrogen, they also lack estrogen’s SHBG-raising effect. This may be relevant in an androgen-sensitive patient, although evidence directly connecting implants with a specific form of alopecia remains limited.

Is It Telogen Effluvium or Female-Pattern Hair Loss?

Feature	Telogen effluvium	Female-pattern hair loss
Onset	Relatively sudden	Gradual
Common timing	Two to three months after starting, stopping or changing contraception	Develops progressively over months or years
Distribution	Diffuse shedding throughout the scalp	Central part and crown thinning
Main change	More hairs falling	Hairs becoming progressively finer
Expected course	Often temporary	Usually progressive without treatment
Can both occur together?	Yes	Yes

This distinction matters because telogen effluvium may improve once the trigger resolves, whereas female-pattern hair loss generally requires ongoing treatment.

A sudden shed can also reveal pre-existing pattern thinning by rapidly reducing the scalp’s overall density.

What Should You Do If a Birth Control Pill Appears to Be Affecting Your Hair?

Do not stop contraception suddenly without a plan

Stopping a hormonal contraceptive can cause another hormonal shift and may itself trigger shedding. It can also result in an unintended pregnancy.

Discuss alternative contraception with the prescribing doctor before making changes.

The Bottom Line

Birth control pills can trigger or worsen hair loss in some women, but they may improve hormonally driven thinning in others.

Starting or stopping hormonal contraception may trigger temporary telogen effluvium.

A relatively androgenic progestin may aggravate female-pattern hair loss in a susceptible individual, while a suitable combined pill may reduce free-androgen activity in some women with hyperandrogenism.

The name or “generation” of the pill is not enough to predict what will happen.

Do not discontinue effective contraception solely because of hair shedding without first discussing an alternative with your doctor.

Frequently Asked Questions

How long after stopping birth control pills can hair loss begin?

Telogen effluvium commonly becomes noticeable around two to three months after a hormonal change. The delay occurs because affected hairs must pass through the resting phase before they are released.

Will hair grow back after stopping birth control?

Hair lost through acute telogen effluvium will usually regrow once the trigger has resolved. Visible recovery may take six to twelve months. Female-pattern hair loss may continue unless it is separately treated.

Which birth-control pill is least likely to cause hair loss?

There is no single best pill for every patient. A doctor may consider a formulation with lower androgenic activity in someone with androgen-sensitive symptoms, but clotting risk and other medical factors are equally important.

Does levonorgestrel cause hair loss?

Hair loss has been reported with levonorgestrel-containing contraception. However, it is uncommon, and an individual report does not prove that levonorgestrel was the only cause.

Should I stop my pill if my hair is falling out?

Not without medical advice and an alternative contraceptive plan. Stopping suddenly may cause another hormonal shift and leave you without pregnancy protection.

Can birth control permanently damage hair follicles?

Telogen effluvium does not permanently destroy follicles. Hormonal contraception may, however, aggravate or reveal progressive female-pattern hair loss in someone who is genetically susceptible.

Can birth control be used to treat female-pattern hair loss?

Selected combined contraceptives may be useful when androgen excess is present or when contraception is also needed. They are not appropriate for everyone and are not a substitute for established hair-loss treatments.

References

1. Williams NM, Randolph M, Rajabi-Estarabadi A, Keri J, Tosti A. Hormonal Contraceptives and Dermatology. American Journal of Clinical Dermatology. 2021.

2. Vujovic A, Del Marmol V. Female Pattern Hair Loss: A Clinical, Pathophysiologic and Therapeutic Review. International Journal of Women’s Dermatology. 2019.

3. Vexiau P, Chaspoux C, Boudou P, et al. Effects of Minoxidil 2% vs Cyproterone Acetate Treatment on Female Androgenetic Alopecia. British Journal of Dermatology. 2002.

4. Paterson H, Clifton J, Miller D, Ashton J, Harrison-Woolrych M. Hair Loss With Use of the Levonorgestrel Intrauterine Device. Contraception. 2007.

5. Health Sciences Authority, Singapore. Safety Advisory on Cyproterone Acetate/Ethinylestradiol.

6. Health Sciences Authority, Singapore. Thromboembolism Risk Associated With Combined Hormonal Contraceptives.

   
   

Medical disclaimer: This article is for general educational purposes and does not replace individual medical advice. Do not start, stop or change contraception without discussing pregnancy protection and medical suitability with a qualified healthcare professional.