PCOS Explained: Symptoms, Diagnosis, and What Actually Helps

Polycystic ovary syndrome is one of the most common endocrine disorders in women of reproductive age, affecting approximately 8 to 13 percent of this population globally. Despite its prevalence, it remains one of the most misunderstood and underdiagnosed conditions I see in gynecology. Women come to me having lived with irregular periods, acne, excess facial hair, and difficulty managing their weight for years, sometimes having been told their symptoms were normal or were advised to simply lose weight without addressing the hormonal cause driving the weight gain. PCOS has a name that suggests ovarian cysts are the central feature; they are not. Understanding what PCOS actually is changes how you approach managing it.

What PCOS Actually Is

PCOS is a hormonal and metabolic syndrome characterized by three main features: irregular or absent ovulation, elevated androgens (male-type hormones) either measurable in the blood or visible through symptoms, and polycystic-appearing ovaries on ultrasound. A diagnosis of PCOS requires at least two of these three features by the Rotterdam criteria, which are the most widely used diagnostic standard internationally.

The name is somewhat misleading. The "cysts" visible on ultrasound are not fluid-filled cysts in the traditional sense. They are multiple small follicles that have been recruited for ovulation but have not been released, because the hormonal signal to complete ovulation (the LH surge) is abnormal. Many women with PCOS on ultrasound never have ovarian pain or any sensation from these follicles. Meanwhile, some women with all the clinical and biochemical features of PCOS do not have polycystic ovaries on ultrasound.

At its core, PCOS involves two interacting dysfunctions: elevated androgen production (from the ovaries and sometimes the adrenal glands) and insulin resistance. These two abnormalities amplify each other. Insulin resistance causes the pancreas to overproduce insulin; high insulin levels stimulate the ovaries to produce excess androgens; excess androgens worsen insulin resistance. This cycle is the engine of PCOS, and it explains why weight, diet, and metabolic health are so central to its management.

Symptoms

Irregular Periods

The most universal feature of PCOS is menstrual irregularity, ranging from cycles longer than 35 days to complete absence of periods (amenorrhea). This reflects irregular ovulation or anovulation: without the hormonal surge that triggers ovulation, the cycle does not progress normally. Some women with PCOS have regular-seeming cycles but are not actually ovulating on them. Menstrual irregularity in PCOS is not just a reproductive inconvenience. It has implications for endometrial health: without regular progesterone exposure from ovulation, the endometrium can develop abnormal thickening over time.

Androgen Excess Symptoms

Elevated androgens produce recognizable physical changes. Hirsutism, excess terminal hair in androgen-sensitive areas including the upper lip, chin, chest, abdomen, and inner thighs, affects 60 to 70 percent of women with PCOS. Acne, particularly the hormonal pattern of deep painful lesions along the jawline and chin that flare with the menstrual cycle, is extremely common. Androgenic alopecia, thinning of the scalp hair at the crown following a male-pattern distribution, affects some women with PCOS. These symptoms are distressing and often significantly affect quality of life and self-esteem.

Weight and Metabolic Symptoms

Insulin resistance in PCOS drives weight gain, particularly abdominal adiposity, and makes weight loss considerably harder than it is for women without this metabolic backdrop. This is not a matter of willpower. The metabolic environment created by insulin resistance and excess androgens actively promotes fat storage and makes caloric restriction less effective without addressing the hormonal drivers. Approximately 50 to 80 percent of women with PCOS have insulin resistance, and many have elevated fasting insulin even with normal fasting glucose, meaning standard diabetes screening may miss the metabolic abnormality.

Fertility

Irregular ovulation is the most common cause of anovulatory infertility in women of reproductive age. Women with PCOS who want to conceive often need assistance with ovulation induction. The good news is that the ovaries in PCOS typically respond well to ovulation induction medications; fertility outcomes for women with PCOS who receive appropriate treatment are generally good.

Diagnosis

Diagnosis involves clinical assessment, blood tests, and pelvic ultrasound, applied against the Rotterdam criteria. Blood tests typically include LH and FSH (elevated LH-to-FSH ratio is classic but not universal in PCOS), testosterone (total and free), DHEAS, androstenedione, sex hormone binding globulin, fasting insulin and glucose (to assess insulin resistance), AMH (anti-Mullerian hormone, which is typically elevated in PCOS), thyroid function, and prolactin (to rule out other causes of irregular periods).

Conditions that mimic PCOS and must be excluded include congenital adrenal hyperplasia, thyroid disorders, hyperprolactinemia, and androgen-secreting tumors. This is particularly important when androgen levels are very high or when virilization is rapid.

Treatment

PCOS does not have a cure, but its symptoms and metabolic consequences are highly treatable. Treatment is individualized based on which symptoms are most prominent and whether fertility is a current concern.

Lifestyle Modification

For women with PCOS who have insulin resistance or are overweight, lifestyle intervention is first-line treatment. Even modest weight loss of 5 to 10 percent of body weight can restore ovulation, reduce androgen levels, and improve metabolic markers in women with PCOS. The mechanism is improved insulin sensitivity, which reduces insulin-driven androgen production. A lower glycemic index diet and regular exercise (combination of aerobic and resistance training) are the most evidence-supported approaches.

The important qualification is that lifestyle change is necessary but often insufficient on its own in women with significant insulin resistance. Addressing the metabolic driver while also treating the hormonal manifestations simultaneously typically produces better outcomes than lifestyle alone.

Combined Oral Contraceptives

For women who do not want to conceive currently, combined oral contraceptives (COCs) address multiple PCOS symptoms simultaneously. Estrogen increases sex hormone binding globulin, which reduces free androgen levels. Progestin provides regular withdrawal bleeds protecting the endometrium. The result is regular periods, improvement in acne and hirsutism, and reduced long-term endometrial cancer risk. Not all progestins are equal: pills containing progestins with anti-androgenic activity (such as cyproterone acetate, drospirenone, or desogestrel) provide greater benefit for androgen symptoms than those with androgenic progestins.

Spironolactone

Spironolactone blocks androgen receptors in the skin and hair follicles and reduces adrenal androgen production. It is highly effective for hirsutism and hormonal acne. It is often used in combination with a contraceptive because it should not be taken in pregnancy. Results for hair growth typically take six to twelve months to become apparent because hair follicle cycling is slow.

Metformin

Metformin, a first-line diabetes medication, improves insulin sensitivity in PCOS and has shown benefits for menstrual regularity, androgen levels, and weight management in insulin-resistant PCOS. It is not a contraceptive and does not provide the endometrial protection of a COC, but for women with metabolic PCOS who cannot or prefer not to use hormonal contraception, it is a useful metabolic option. It is also used alongside ovulation induction in women with PCOS who are trying to conceive.

Ovulation Induction for Fertility

Letrozole (an aromatase inhibitor) is now the first-line ovulation induction agent for PCOS, having superseded clomiphene in most guidelines. It produces better ovulation and pregnancy rates in PCOS with less risk of ovarian hyperstimulation. Women who do not respond to letrozole may require injectable gonadotropins or, in some cases, surgical intervention (ovarian drilling, which is done laparoscopically and temporarily improves ovarian function by reducing androgen-producing tissue).

Long-term Health Implications

PCOS is not just a reproductive condition. The metabolic abnormalities associated with it, particularly insulin resistance and compensatory hyperinsulinemia, significantly increase long-term risks. Women with PCOS have approximately three times the risk of developing type 2 diabetes compared to the general female population. Cardiovascular disease risk is increased, driven by dyslipidemia, hypertension, and the inflammatory state that accompanies insulin resistance. Endometrial cancer risk is increased due to chronic anovulation and unopposed estrogen stimulation of the endometrium. Mental health conditions, particularly depression and anxiety, are significantly more prevalent in PCOS.

These risks reinforce why PCOS management extends beyond symptom control. Monitoring metabolic markers annually, addressing insulin resistance early, and ensuring regular endometrial protection through hormonal therapy or regular withdrawal bleeds are not optional extras. They are core components of long-term PCOS care.

When to See a Doctor

If you have irregular periods, signs of androgen excess, difficulty losing weight despite reasonable effort, or have been struggling to conceive for more than a year (six months if over 35), PCOS is worth investigating. A gynecologist or endocrinologist can evaluate your symptoms, order appropriate blood tests, and design a treatment plan matched to your specific presentation and goals. JourneyDoctors gynecologists are available for consultations from $19.

Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment of any medical condition.

Frequently Asked Questions

Can you have PCOS with regular periods?

Yes. Some women with PCOS have cycles that appear regular (occurring every 21 to 35 days) but are not ovulatory. They may still have elevated androgens and polycystic-appearing ovaries meeting Rotterdam criteria. This is one reason why PCOS is underdiagnosed: the assumption that regular periods rule it out is incorrect.

Does PCOS go away after menopause?

The ovarian features of PCOS, including irregular ovulation and androgen excess from the ovaries, typically improve after menopause as ovarian function declines. However, the metabolic features, particularly insulin resistance, persist and continue to carry risk. Menopausal women with a history of PCOS should continue monitoring metabolic markers even after the reproductive symptoms resolve.

Is PCOS genetic?

PCOS has a strong hereditary component. Having a first-degree relative with PCOS significantly increases your risk. Several genes involved in androgen synthesis and insulin signaling have been implicated, though no single causal gene has been identified. PCOS is considered polygenic, meaning multiple genetic variants contribute in the context of environmental factors.

Can PCOS be cured?

PCOS does not have a cure in the sense of an intervention that permanently normalizes the hormonal and metabolic environment. However, symptoms are highly manageable, and the metabolic risks are significantly reducible through lifestyle and medical treatment. Many women with PCOS lead entirely normal lives with appropriate management. Thinking of it as a manageable chronic condition rather than an incurable disease is more productive clinically and psychologically.

What is the connection between PCOS and mental health?

Depression and anxiety are significantly more common in women with PCOS than in the general population, for multiple reasons. The physical symptoms of hirsutism, acne, weight gain, and hair loss have direct psychological effects on body image and self-esteem. The chronic nature of the condition and fertility concerns add psychological burden. And insulin resistance and androgen excess have direct neurobiological effects on mood and cognition. Mental health screening should be part of routine PCOS care, not an afterthought.