Getting Pregnant with PCOS: Fertility Challenges and Natural Treatment

PCOS is the most common cause of anovulatory infertility; but the prognosis is far better than many patients fear. For most women with PCOS, with the right support, getting pregnant with PCOS is very achievable. The key is working strategically, starting with evidence.

Fertility in PCOS (or PMOS) is primarily disrupted by irregular or absent ovulation (oligo-ovulation or anovulation). The hormonal environment of PCOS – elevated LH, elevated androgens, inflammation, and often elevated insulin – disrupts the normal follicular recruitment process, preventing the dominant follicle from maturing and releasing an egg on a predictable cycle.¹

The good news: the ovaries in PCOS typically have an abundant antral follicle count. The problem is not a shortage of eggs; it is impaired signalling, which in turn impairs egg development. Strategies that restore more normal hormonal signalling can restore ovulation and, with it, opportunities for natural conception with PCOS.

The Foundation: Lifestyle as First-Line Treatment for Getting Pregnant with PCOS

The 2023 International Evidence-Based PCOS Guideline is unequivocal: lifestyle intervention is the first-line treatment for infertile anovulatory women with PCOS.² For women who are overweight, even a 5% reduction in body weight has been shown to restore ovulation and improve response to ovulation induction medications.³

Key evidence-based lifestyle components for getting pregnant with PCOS:

• Dietary pattern: A diet high in fibre, adequate protein (~1 g/pound body weight), and low in refined carbohydrates reduces post-prandial insulin and improves androgen profiles. No single dietary pattern is superior; the key is to reduce glycemic load and support insulin sensitivity.³
• Exercise: Regular aerobic exercise (150+ minutes per week) combined with resistance training improves insulin sensitivity and may independently improve menstrual frequency. Avoid excessive high-intensity training, which can stress the HPA axis in some women.²
• Sleep and stress: HPA axis dysregulation from poor sleep and chronic stress suppresses reproductive hormones. Optimizing sleep hygiene and stress physiology is a meaningful and underutilized lever.

Myo-Inositol: What the Evidence Actually Says About It And Getting Pregnant with PCOS

Myo-inositol is one of the most commonly recommended supplements in PCOS fertility treatment. It acts as an insulin sensitizer by serving as a second messenger in insulin signalling, and is naturally concentrated in ovarian follicular fluid.⁴

The 2023 International PCOS Guidelines’ own systematic review confirmed that inositol improves several hormonal and metabolic markers in PCOS. However, the guidelines are also specific: myo-inositol is not recommended as a stand-alone fertility treatment and has not shown superiority over metformin on clinical pregnancy rates in RCTs. It is best positioned as part of a broader approach.^4,5

The 40:1 ratio of myo-inositol to D-chiro-inositol mirrors the body’s physiologic plasma balance and is supported by an international consensus statement. This ratio appears preferable to myo-inositol alone or higher D-chiro-inositol (DCI) fractions, which may impair egg quality at higher concentrations (the “DCI paradox”).⁴

When Ovulation Induction Is Needed

For women who do not resume ovulation with diet, lifestyle, stress reduction and naturopathic measures, medical ovulation induction is the evidence-based next step. The 2023 PCOS Guidelines recommend letrozole as the first-line pharmacological ovulation induction agent in anovulatory infertile women with PCOS with no other infertility factors.²

Letrozole (an aromatase inhibitor) has been shown to produce higher ovulation rates, better pregnancy rates, and higher live birth rates than clomiphene citrate, with a more favourable endometrial environment and lower multiple pregnancy risk.⁶ A head-to-head RCT found letrozole produced a 29% pregnancy rate versus 15.4% for clomiphene (p=0.015).⁷

Naturopathic care during a medically monitored ovulation induction cycle can focus on optimizing the hormonal environment, reducing insulin resistance, supporting follicular development, reducing inflammation, and supporting luteal phase adequacy, creating a complementary, collaborative approach.

Other Evidence-Based Considerations for Getting Pregnant with PCOS

• Folate/methylfolate: Minimum 400 µg daily, ideally as L-5-methyltetrahydrofolate for women with MTHFR variants, started at least 3 months pre-conception
• Vitamin D: Vitamin D deficiency is prevalent in PCOS and associated with worse hormonal and metabolic profiles – assess and correct as indicated
• Berberine and metformin: Both improve insulin sensitivity and have evidence supporting improved ovulation rates in PCOS, though berberine must be discontinued before confirmed pregnancy⁸
• Thyroid optimization: Subclinical hypothyroidism is more common in PCOS and independently impairs fertility – ensure TSH is optimized (ideally below 2.5 mIU/L pre-conception)