Does PCOS Cause Hair Loss? Androgens, Crown Thinning and Transplant Assessment

Possibly. Polycystic ovary syndrome (PCOS) often comes with raised androgen levels, which can gradually make genetically sensitive follicles finer. This shows up as thinning at the crown and a wider parting, a form of female pattern hair loss. The hair loss may also appear alongside irregular periods, weight changes or other hormonal problems, so stabilising your health first and then assessing whether a transplant is suitable gives a longer-lasting result.

Key points: PCOS hair loss is mostly female pattern hair loss, usually thinning at the crown and parting while the front hairline is preserved. If you also have irregular periods, acne, or more facial or body hair, it is worth checking hormones and metabolism together. Stabilise your hormones with a gynaecologist or endocrinologist first; then a transplant doctor assesses whether the hair loss is stable, whether the donor area is sufficient, and how the parting and crown can be filled in.

Why does PCOS cause hair loss? Androgens and hair follicles

Polycystic ovary syndrome is a common endocrine condition in young women. Its main features are irregular ovulation, raised androgen levels and a polycystic appearance of the ovaries on ultrasound. In recent years organisations such as the NHS have begun using a new name that emphasises its endocrine and metabolic nature, rather than seeing it only as an ovarian problem.

Some follicles on the scalp are more sensitive to androgens. When androgen activity is strong and there is a genetic tendency, follicles around the crown and parting shrink cycle after cycle, the growth phase shortens, and the hair grows finer and shorter, so the hair looks thinner and the scalp more visible. Insulin resistance and weight changes can make the hormonal imbalance more pronounced.

However, not everyone with PCOS loses hair, and not every woman with female pattern hair loss has PCOS. In my clinic I look at the scalp together with clues from your periods, skin and weight so that no cause is missed.

If you are also worried that your hair loss is linked to genetics, see Is baldness inherited from dad or uncle?.

What does PCOS hair loss look like, and how is it different from other hair loss?

PCOS-related hair loss most often shows as gradual thinning at the crown and parting. Here are some conditions that are easily confused, so you can compare:

In practice these often overlap. For example, someone with PCOS who diets hard to lose weight may develop telogen effluvium on top, making the hair loss more noticeable.

If you are also wondering whether a widening parting can be linked to hormonal change, see Menopause Hair Loss: Hormonal Changes, Thinning at the Crown and Transplant Assessment.

Besides hair loss, what are the other warning signs of PCOS?

PCOS affects more than your hair. If any of the following apply, talk to a gynaecologist or endocrinologist:

• Your cycle often goes more than a month between periods, or you have clearly fewer periods a year.
• Hair on the chin, around the mouth, chest or abdomen becomes thicker or more abundant.
• You keep getting acne as an adult, especially around the chin and jawline.
• You gain weight easily, your waist gets thicker, or the skin on your neck or armpits becomes darker and thicker.
• You are trying to conceive without success.

If these symptoms come together with thinning at the crown, it is even more important to check hormones and metabolism properly. Early care is not only about your hair; it also matters for future blood sugar, cholesterol and fertility plans.

If you are also worried that your hair loss may be linked to your thyroid, see Can Thyroid Problems Cause Hair Loss? Hypothyroid vs Hyperthyroid Shedding, Tests and When to See a Doctor.

What tests might the clinic do?

When assessing, I first ask about your menstrual cycle, weight changes, acne and hair growth, medication and family history, then use dermoscopy to see whether follicle thickness is uneven. Blood tests and other investigations are arranged together with a gynaecologist or endocrinologist depending on your symptoms:

The timing of blood tests sometimes needs to match your cycle, and you should tell your doctor if you are taking any hormonal medication so the results are accurate.

Why stabilise your hormones with your doctor before a transplant?

PCOS hair loss is closely tied to androgens and metabolism, so before we talk about a transplant I ask you to work with a gynaecologist or endocrinologist to get your periods, hormones and weight under control. Where needed, your doctor may also add a scalp treatment to slow the thinning of your own hair.

The aim of this step is not to replace a transplant but to protect its result: the follicles moved to the crown come from the back of the head and are less affected by androgens, but if the surrounding hair is still thinning quickly, overall density after surgery is easily pulled down. The details of medical treatment and the choice of medication should be decided by your specialist based on your condition and fertility plans.

If you are also worried about shedding suddenly speeding up while losing weight, see Sudden Faster Hair Loss: 5 Common Causes and How Doctors Assess It.

What can you do in daily life?

Lifestyle habits cannot replace treatment, but they matter especially for hormones and metabolism in PCOS, and they reduce extra triggers for shedding:

• Regular exercise: helps improve insulin resistance; choose something you can keep up long term.
• Steady weight loss: if you are overweight, losing weight slowly suits you better than crash dieting and is less likely to trigger shedding.
• Balanced diet: cut down on refined sugar and sugary drinks, and get enough protein and iron-rich foods.
• Sleep and stress: an irregular routine makes hormones harder to stabilise.
• Be gentle with your hair: limit heat styling and frequent bleaching, and don’t tie your hair too tightly.
• Take regular photos: photographing the crown in the same light and angle shows change better than counting hairs every day.

If you are also wondering whether diet and nutrition affect hair loss, see What should I eat to improve hair loss? Hair-growth foods, nutrients, and doctor recommendations.

Can PCOS hair loss be treated with a hair transplant? When is it stable?

It can be assessed. PCOS-related hair loss is female pattern hair loss, with thinning usually concentrated at the crown and parting, while the follicles at the back of the head are relatively stable; these are the source a transplant can draw from. Timing is the key: surgery once the hair loss has entered a stable phase gives a result that lasts better.

When I judge whether it is “stable”, I don’t rely on a single visit; I look at these signs together:

If you are still shedding quickly, I recommend monitoring for a while rather than rushing to book surgery.

If you are also wondering what else needs assessing before a transplant, see What to Assess Before a Hair Transplant? Suitability, Follicles, and the Evaluation Process.

How do I assess the donor area and the progression of hair loss?

Female pattern hair loss differs from male pattern hair loss in that the back of the head can sometimes thin too, so donor assessment is the most important step in a female transplant. In clinic I personally check the following before deciding whether it can be done and how much can be covered:

As for technique, women can usually have FUE without shaving or with only partial shaving, making it easier to cover with existing hair afterwards; the exact approach depends on the donor area and the area to be filled.

If you are also wondering about the difference between FUE and FUT, see How to Choose a Hair Transplant Method? FUT, FUE and COMBO Compared.

How are the female parting and hairline designed?

What people with PCOS mind most is usually a widening parting and visible scalp at the crown. When designing, my aim is to fill the gaps between your existing hairs, not to create a hard line on top of the head:

• Parting: density is added on both sides along the direction you usually part your hair, so the parting looks narrower.
• Crown: grafts follow your original whorl and hair direction to avoid a messy look.
• Front hairline: most people with PCOS keep their front hairline well; if your forehead is naturally high, we can also assess whether to refine it.
• Density distribution: limited grafts go first where they make the most visible difference, such as the front of the parting and the centre of the crown.

If you are also wondering how far a female hairline can be adjusted, see How Low Can a Female Hairline Transplant Go? Design Limits Explained.

How much can a transplant achieve, and how do pregnancy plans affect timing?

A transplant can make the gaps at the parting and crown less noticeable, but female pattern hair loss covers a wider area and donor hair is limited, so it usually cannot bring back the density you had at your fullest. Before surgery I use photos to discuss the area and density with you so your expectations match what is realistic. Transplanted follicles take around a year to grow in gradually, and your own hair still needs care during that time.

People with PCOS often have fertility plans too, so the timing of surgery needs to be considered together:

After surgery I arrange regular follow-ups to track how the transplanted hair grows, and remind you to keep up hormone follow-up with your physician so both your own and the transplanted hair are maintained.

If you are also wondering how crown density is planned, see Why Does a Crown Hair Transplant Need More Grafts? Whorl, Area and Density Planning.

A note from the doctor

In my clinic, women in their twenties and thirties often ask me anxiously: “Doctor, my crown keeps getting thinner. Can I have a transplant?” When I ask more, I often find they also have irregular periods, recurring acne or weight that is hard to control. These are all clues pointing to PCOS.

My advice is to first stabilise your hormones with a gynaecologist or endocrinologist, while I track the extent and speed of your hair loss. Once it is stable, I personally examine your donor area to assess how many grafts can be taken and how the parting and crown should be filled in, taking future hair loss and your fertility plans into account.

A transplant can make the parting and crown less noticeable, but donor hair in women is limited. I will explain clearly which areas have a chance of improving and where the limits are, so you can decide once you understand.

This article is general medical information and does not replace an individual diagnosis.

Medical references

• American Academy of Dermatology: Thinning hair and hair loss: Could it be female pattern hair loss?
• NHS: Polyendocrine metabolic ovarian syndrome (PMOS)
• World Health Organization: Polycystic ovary syndrome
• U.S. Office on Women’s Health: Polycystic ovary syndrome
• Rayner DG, McMullen E, Mundle K, et al. Bi-directional association between female pattern hair loss and polycystic ovary syndrome: A systematic review and meta-analysis. JAAD International (2025)