Understanding PCOS and Ovulation
PCOS disrupts fertility primarily through anovulation — failure to release an egg. The hormonal imbalance (elevated androgens, insulin resistance, disrupted LH/FSH ratio) prevents follicles from maturing fully and ovulating normally. Many women with PCOS have plenty of eggs — they're just stuck in a holding pattern.
The Treatment Ladder
Level 1: Lifestyle Modification (Start Here)
For overweight women with PCOS, losing just 5-10% of body weight can restore ovulation in up to 70% of cases. The mechanism: reduced insulin resistance improves hormonal balance. Combine weight management with inositol supplementation (see below) for synergistic effects.
Level 2: Ovulation Induction Medications
Letrozole (Femara): Now the first-line medication for PCOS-related anovulation, replacing clomid. A 2014 NEJM study showed letrozole produced higher live birth rates (27.5% vs 19.1%) and lower multiple pregnancy rates compared to clomid in women with PCOS.
Clomiphene (Clomid): Still widely used but increasingly second-line to letrozole. Effective in 60-80% of women for inducing ovulation, though pregnancy rates per cycle are lower.
Metformin: Insulin-sensitizing medication that can restore ovulation in some PCOS women, especially those with significant insulin resistance. Often used in combination with letrozole.
Level 3: Injectable Gonadotropins
If oral medications don't produce ovulation, low-dose FSH injections (gonadotropins) are the next step. Requires careful monitoring with ultrasound to prevent ovarian hyperstimulation — PCOS ovaries are particularly sensitive to stimulation.
Level 4: IVF
Women with PCOS who don't conceive with ovulation induction may move to IVF. PCOS patients actually tend to respond well to IVF stimulation (producing many eggs), but careful protocols are needed to prevent ovarian hyperstimulation syndrome (OHSS).
Supplements with Strong Evidence for PCOS
• Legro RS, et al. "Letrozole versus clomiphene for infertility in PCOS." NEJM. 2014.
• Teede HJ, et al. "International evidence-based guideline for PCOS." Hum Reprod. 2018.
• Pundir J, et al. "Inositol treatment of anovulation in PCOS." Eur J Endocrinol. 2018.
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