PCOS Is the Most Common Cause of Ovulatory Infertility — But It’s Treatable
If you have PCOS and you want to have children someday, there’s an important message we want you to hear clearly: having PCOS does not mean you can’t have children. PCOS is the most common cause of ovulatory infertility, responsible for up to 80 percent of cases where infertility is related to a failure to ovulate regularly. But ‘most common cause’ is very different from ‘insurmountable barrier.’
The majority of women with PCOS who want to conceive are able to with appropriate medical support. The path there may require some patience and guidance from a knowledgeable gynecologist, but the destination is very much achievable for most.
Why PCOS Affects Fertility
The fertility challenge in PCOS comes down to ovulation — or the lack of it. As we’ve discussed in other posts, PCOS disrupts the normal hormonal process that leads to follicle maturation and egg release. Without regular ovulation, there’s no egg available for fertilization, which makes natural conception difficult.
Some women with PCOS do ovulate occasionally — just irregularly and unpredictably. This means natural conception is possible but timing is harder to manage. Other women with more severe ovulatory dysfunction may rarely or never ovulate on their own, making medical intervention necessary to achieve pregnancy.
Insulin resistance, common in PCOS, also plays a role. Elevated insulin levels can disrupt the LH surge that triggers ovulation, and high androgens further interfere with follicle development. Addressing insulin resistance is therefore an important part of fertility treatment in many PCOS patients.
Lifestyle Changes First
For women with PCOS who are overweight, evidence consistently shows that even modest weight loss — just 5 to 10 percent of body weight — can meaningfully improve ovulatory function and increase the chance of natural conception. The mechanism is largely through improved insulin sensitivity, which reduces androgen production and allows follicles to mature more normally.
This doesn’t mean you have to be at your ‘ideal’ weight before you can pursue fertility treatment, and it absolutely doesn’t mean weight loss is a cure-all. Lean women with PCOS also face fertility challenges. But if weight is a factor, it’s worth addressing as part of a comprehensive fertility-focused plan.
Regular moderate exercise also improves insulin sensitivity and can support ovulatory function. The type of exercise matters less than consistency — find something you enjoy and can stick to. The 2023 international PCOS guidelines recommend 150 minutes of moderate activity per week for general health benefits, and this applies to women pursuing conception as well.
First-Line Fertility Treatments
When lifestyle changes alone aren’t enough to restore ovulation, medications to stimulate ovulation (ovulation induction) are the standard next step. There are several options, and the right one depends on your individual situation.
Letrozole (brand name Femara) is currently considered the first-line medication for ovulation induction in women with PCOS according to the American Society for Reproductive Medicine (ASRM) and most evidence-based guidelines. It’s an aromatase inhibitor — originally developed for breast cancer treatment — that works by temporarily lowering estrogen levels, which prompts the pituitary to release more FSH and stimulate follicle growth. Letrozole has better live birth rates in PCOS than the older standard treatment and a lower risk of multiple pregnancies.
Clomiphene citrate (Clomid) is the other well-established option, though letrozole has largely replaced it as the preferred first choice. It still works well for many women and may be used when letrozole isn’t appropriate or available.
Metformin may be added to either of these medications to improve insulin sensitivity and ovulatory response, particularly in women with significant insulin resistance. Some providers also use metformin alone as a first step for women with mild ovulatory dysfunction.
When First-Line Treatments Don’t Work
If two to four cycles of letrozole or clomiphene haven’t resulted in pregnancy, the next step is typically referral to a reproductive endocrinologist — a subspecialist in fertility — for more advanced evaluation and treatment.
Options at this stage may include gonadotropin injections (FSH and/or LH given by injection to stimulate the ovaries), which are more powerful than oral medications but also carry a higher risk of multiple follicles developing at once. Close monitoring with ultrasound is essential.
Laparoscopic ovarian drilling is a surgical procedure sometimes used in PCOS — it involves making small punctures in the ovary to reduce androgen production and restore ovulatory cycles. It’s not a first-line treatment, but it’s an effective option for some women, particularly those who have responded poorly to medications.
IVF (in vitro fertilization) is available for women with PCOS who haven’t achieved pregnancy with other methods. Women with PCOS actually typically respond very well to ovarian stimulation for IVF — sometimes too well, which is why careful protocol design and monitoring is important to avoid ovarian hyperstimulation syndrome (OHSS).
PCOS and Pregnancy: Once You Conceive
Women with PCOS have a somewhat higher risk of certain pregnancy complications, including gestational diabetes, pregnancy-induced hypertension, and preterm birth. This doesn’t mean your pregnancy will be complicated — many women with PCOS have completely uncomplicated pregnancies. But it does mean your pregnancy should be followed with appropriate monitoring.
Prenatal care should include early screening for gestational diabetes (often before the standard 28-week glucose challenge), blood pressure monitoring, and discussion of risk factors with your OB. If your PCOS was associated with metabolic issues like elevated fasting glucose or insulin resistance before pregnancy, those factors should be on your prenatal team’s radar.
Hope Is the Right Baseline
For most women with PCOS who want to conceive, the question isn’t ‘if’ but ‘how’ and ‘with what support.’ Start with a thorough evaluation from a gynecologist who understands PCOS, address metabolic factors where relevant, and move through the treatment ladder systematically.
Our team in Sugar Land and Missouri City is experienced in supporting women with PCOS through every stage of their reproductive journey. Whether you’re thinking about having children in the near future or just want to understand your options, come talk to us.
