When a woman asks me whether her widening part can be treated, I can almost always tell her yes, and that starting early protects the most hair. Most women begin with topical minoxidil, which the FDA approved for female pattern hair loss as a 2% solution and as a once-daily 5% foam, with a supporting regimen for the scalp alongside it. Anti-androgen tablets or low-dose oral minoxidil come in when more is needed.

Getting there starts with being sure it’s pattern loss, since several other causes look similar and need a different plan.

What causes female pattern hair loss

The pattern most women notice is a part that looks a little wider in every photo, while the hairline at the front stays where it’s always been. Dermatologists sometimes describe it as a Christmas-tree shape, with thinning that’s broadest near the front of the part and narrows toward the crown.

Underneath that pattern, follicles are slowly shrinking, so a hair that once grew long and thick is replaced, cycle by cycle, by finer and shorter ones, the process dermatologists call androgenetic alopecia.

A woman with pattern loss has usually inherited follicles that are sensitive to androgens, the hormones thought of as male, but that doesn’t mean her hormone levels are high. Most have perfectly normal blood tests, and what differs is how strongly their follicles respond.

A community study in Maryborough, Australia, found some degree of female pattern hair loss in 12% of women by age 29 and 25% by age 49. Among women over 80, mid-frontal thinning was present in 57%, which makes it one of the most common conditions dermatologists treat in women.

Many women first notice it in their 40s and 50s, when estrogen falls during perimenopause, and some first see it after a pregnancy, once postpartum shedding has settled and the part doesn’t fill back in.

How it’s diagnosed

When a woman tells me her part is widening, the first thing I want to know is how long it’s been happening and whether it came on gradually. Pattern loss builds over years. If her hair instead started coming out in handfuls a few months after a bad flu, I’d suspect telogen effluvium, which usually settles on its own.

Looking at the scalp under magnification, which dermatologists call trichoscopy, is the most useful part of the exam, and in pattern loss I see hairs of very different thicknesses side by side at the part, with fine miniaturized hairs mixed in among normal ones, often before anyone would call the hair thin. A biopsy is rarely needed, but it can settle the question when the picture isn’t clear.

Blood work comes next, and ferritin is the test I’d most want to see. Low iron stores are common in women with heavy periods and can make any kind of thinning worse, and correcting them helps other treatments work. Thyroid function is the other check I’d add as a matter of routine.

If a woman also has irregular periods along with adult acne or new chin hair, I’d look further at androgen levels, because polycystic ovary syndrome can drive pattern thinning earlier and harder. That changes the treatment plan, and it’s worth knowing about for her general health.

A smooth, round bald patch, or a scalp that’s sore, red, or scaly, needs a dermatologist’s eye within weeks, since conditions like alopecia areata and the scarring alopecias are treated very differently.

The treatment ladder at a glance

Step	Option	Evidence	Good to know
1	Topical minoxidil	FDA-approved for women	2% solution or 5% foam
2	Anti-androgen tablets	Clinical studies, off-label	Not in pregnancy
3	Low-dose oral minoxidil	Trial vs topical	Prescription, off-label
Alongside	Supporting regimen	Smaller trials	Scalp and follicle support
Advanced	Hair transplant	Surgical	Stable, localized loss

Step 1: Topical minoxidil

Does a stronger dose do more for women? That was the question behind a 48-week trial that randomized 381 women aged 18 to 49 to one of two minoxidil strengths or a placebo solution. Both strengths beat placebo on hair counts, and the 5% solution brought a little more facial hair and scalp itching than the 2%.

The 2% strength held up again when Areeba Adil and Marshall Godwin combined the placebo-controlled hair loss trials into one analysis in 2017, which found it effective for women in its own right.

Women can now choose either form over the counter. The 2% solution is applied twice a day, and a 5% foam approved for women in 2014 is used once a day, which many find easier to stick with.

Minoxidil works directly on the follicle, keeping hairs in their growth phase longer and helping shrunken follicles grow thicker hairs again. It doesn’t change hormone levels, so it suits women whatever their hormonal picture.

The first few weeks can be unsettling, because some women see extra shedding as resting follicles restart and push out old hairs. That usually calms down within a couple of months, and real results tend to show between months four and six. I’d hold off during pregnancy and while breastfeeding, and it needs to be used consistently to keep its benefit.

Step 2: Anti-androgen tablets

Rodney Sinclair’s group in Melbourne treated 80 women with biopsy-confirmed pattern loss using one of two anti-androgen tablets, spironolactone or cyproterone acetate, for at least a year. In 2005 they reported regrowth in 44% of the women and stable hair in another 44%, so only about one woman in eight kept losing hair.

Spironolactone is the one most often used in the US, where cyproterone isn’t available. It blocks androgens from acting on the follicle and is usually prescribed off-label for hair, often alongside minoxidil, which works by a different route.

I reach for it most readily when a woman has adult acne or irregular cycles alongside her thinning, though women with normal hormone levels can benefit too. It can affect a developing male fetus, so it’s prescribed with reliable contraception, and blood pressure, sometimes potassium too, gets checked along the way.

Finasteride, which some dermatologists prescribe off-label for women past menopause, isn’t suitable for any woman who could become pregnant.

Step 3: Low-dose oral minoxidil

A small tablet of minoxidil, at a fraction of the dose once used for blood pressure, has become one of the biggest changes in hair loss treatment over the past few years. In a 2020 Brazilian trial, with Rodney Sinclair among the authors, 52 women took either 1 mg of oral minoxidil a day or applied 5% topical minoxidil, and after six months the two groups had similar results.

That makes the tablet a practical option for women who find twice-daily scalp application hard to keep up, or whose scalp is irritated by the solution. Increased facial and body hair was the most common side effect, reported by about a quarter of the women on the tablet, and a few noticed mild ankle swelling.

It’s prescribed off-label, at very low doses, and a doctor will want to know about any heart or blood pressure history before starting it.

Supporting the scalp alongside treatment

A medical treatment does its best work on a healthy scalp, with follicles that have what they need to build hair. That’s where a supporting regimen earns its place, alongside minoxidil rather than instead of it.

Saw palmetto has the most evidence among natural ingredients that act on the DHT pathway. In one randomized trial in women with self-perceived thinning, terminal hair counts rose 10.4% over six months on a multi-ingredient supplement containing saw palmetto, against 3.5% on placebo. Rosemary blocks the same enzyme in lab studies and helps protect follicles from DHT in mice, and it’s well tolerated on the scalp.

If a blood test shows low iron or vitamin D, I’d correct that before judging any treatment, since it can hold results back, and I’d ask about protein with any woman who’s eating less than she used to.

Women who like the idea of a device sometimes ask me about home laser caps, and several low-level laser devices are FDA-cleared for pattern hair loss. Others hear about platelet-rich plasma injections, which some clinics offer and which help some women, with protocols that still differ from one practice to the next.

Is a transplant worth considering?

I’d raise a transplant with a woman whose thinning has held steady for a year or two and sits mostly at the front of her part, because that’s where moved follicles can restore the most density. She’d still keep up her medical treatment afterward, to protect the hair around the transplanted area.

Four women, four plans

A 38-year-old whose part has been widening slowly for three years, with normal ferritin and thyroid results, is the most common situation I see. For her I’d start topical minoxidil, either the 2% solution or the 5% foam, with a supporting regimen alongside it, and plan to judge the result at six months with a photo of her part taken on day one.

Things look different for a 46-year-old with irregular periods and adult acne whose thinning has sped up over the last year. I’d want her hormones checked, and spironolactone may well join minoxidil in her plan, prescribed by a dermatologist who can follow her up.

Then there’s the woman who tried the solution, found her scalp itched, and gave up after a month. The once-daily foam is often gentler, and if that still doesn’t suit her, low-dose oral minoxidil is worth discussing with a doctor.

A woman whose shedding after her second baby has stopped, but whose part never filled back in, is often seeing pattern loss that the pregnancy brought forward. Since minoxidil is best avoided while breastfeeding, I’d start it once she has weaned, with nutrition and an iron check as the focus until then.

The bottom line: starting minoxidil early, with a supporting regimen alongside it, protects the most hair in female pattern hair loss.

Where MDhair fits

Our Regrowth Kits are built for pattern hair loss. The Essential Regrowth Kit ($66) pairs Regrowth Serum, made for sensitive and dry scalps with saw palmetto and rosemary, with Regrowth Shampoo. The Advanced Regrowth Kit adds Regrowth Supplements, which bring saw palmetto and pygeum together with vitamins and minerals to work on the hormone side from the inside.

Our minoxidil 2% ($24) is the medicated step, and it’s the strength the FDA approved for women with pattern hair loss. Used alongside a Regrowth Kit, it covers the follicle and the DHT pathway together.

The clinical trial my team and I ran on MDhair’s personalized regimen lasted six months and appeared in the Journal of Drugs in Dermatology in 2025. We compared it with the leading hair loss supplement brand. By day 90, hair growth had improved about 2.8 times as much, and hair quality improved about 3.0 times as much.

I’ll be specific about regulation, because it’s easy to blur. Minoxidil is the one product we sell with OTC drug status, for mild-to-moderate androgenetic hair loss, while our serums and shampoos are cosmetics and our supplements are dietary supplements. The FDA hasn’t evaluated what we say about those, and none of them is meant to diagnose, treat, cure, or prevent disease.

Because saw palmetto and pygeum act on hormones, Regrowth Supplements aren’t meant for pregnancy, for anyone trying to conceive or breastfeeding, or for anyone under 18, and minoxidil should also be paused in pregnancy. A woman taking hormone-related medication or blood thinners, or being treated for a thyroid condition, should check with her doctor first, and a serum that irritates the scalp is one to stop rather than push through.

Which combination fits depends on what’s behind your thinning. Our free AI hair and scalp assessment starts with a short quiz and a scalp photo, matches a regimen to what it finds, and includes unlimited chat access to our dermatologist team. You can take the assessment here.

Sources

Studies were located through PubMed and the publishing journals’ own sites.

1. Gan EK, Sinclair RD. Prevalence of male and female pattern hair loss in Maryborough. J Investig Dermatol Symp Proc. 2005;10(3):184-189. doi:10.1111/j.1087-0024.2005.10102.x
2. Lucky AW, Piacquadio DJ, Ditre CM, et al. A randomized, placebo-controlled trial of 5% and 2% topical minoxidil solutions in the treatment of female pattern hair loss. J Am Acad Dermatol. 2004;50(4):541-553. doi:10.1016/j.jaad.2003.06.014
3. Adil A, Godwin M. The effectiveness of treatments for androgenetic alopecia: a systematic review and meta-analysis. J Am Acad Dermatol. 2017;77(1):136-141.e5. doi:10.1016/j.jaad.2017.02.054
4. Sinclair R, Wewerinke M, Jolley D. Treatment of female pattern hair loss with oral antiandrogens. Br J Dermatol. 2005;152(3):466-473. doi:10.1111/j.1365-2133.2005.06218.x
5. Ramos PM, Sinclair RD, Kasprzak M, Miot HA. Minoxidil 1 mg oral versus minoxidil 5% topical solution for the treatment of female-pattern hair loss: a randomized clinical trial. J Am Acad Dermatol. 2020;82(1):252-253. doi:10.1016/j.jaad.2019.08.060
6. Evron E, Juhasz M, Babadjouni A, Mesinkovska NA. Natural hair supplement: friend or foe? Saw palmetto, a systematic review in alopecia. Skin Appendage Disord. 2020;6(6):329-337. doi:10.1159/000509905
7. Murata K, Noguchi K, Kondo M, et al. Promotion of hair growth by Rosmarinus officinalis leaf extract. Phytother Res. 2013;27(2):212-217. doi:10.1002/ptr.4712
8. Bhardwaj V, Rodgers N, Harth O, Harth Y. Artificial intelligence-based personalization of treatment regimen for hair loss: a 6-month clinical trial. J Drugs Dermatol. 2025;24(3):233-238. doi:10.36849/JDD.8611

Dr. Yoram Harth is a board-certified dermatologist and Co-Founder and Chief Medical Officer of MDalgorithms Inc., the company behind MDhair and MDacne. A magna cum laude graduate of Tel Aviv University’s Sackler School of Medicine, he trained in dermatology at Rambam Medical Center and completed a research fellowship at Columbia-Presbyterian Medical Center in New York. His work spans phototherapy, photodynamic therapy, and AI-personalized skin and hair care.

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