Can I get pregnant with PCOS?

It is one of the more treatable reasons for difficulty conceiving, precisely because the obstacle is usually a missing ovulation rather than something structural. ASRM's list of ovulation-inducing treatments — clomiphene, letrozole, gonadotropins, metformin where insulin resistance is involved — exists because restoring ovulation is often achievable.

My cycles are irregular. Should we still wait a year before asking?

No. The twelve-month threshold assumes regular cycles with a predictable ovulation. Irregular or absent periods are a reason to be seen sooner, because the thing in the way is identifiable and treatable rather than a matter of persistence.

My ovaries looked normal on the scan. Does that rule it out?

No. Diagnosis requires two of three features — irregular ovulation, high testosterone, and polycystic-appearing ovaries — so it is entirely possible to have it without the scan finding. This is a common reason people rule themselves out incorrectly.

Why is it being called PMOS now?

ASRM endorses renaming it Polyendocrine Metabolic Ovarian Syndrome to better reflect the hormonal and metabolic aspects rather than naming it after how the ovaries look. Both names are in use; PCOS is still what most people and most searches use.

Before it starts · 4 min read

PCOS, and a cycle you can't predict

If your periods arrive weeks apart, or barely at all, then every piece of ovulation-timing advice you have read has been written for someone else's cycle.

That is the practical heart of this, and it is why it belongs on a page about trying to conceive rather than in a general explainer.

Last updated August 20, 2026

Why it changes the plan

The feature that matters here is chronic anovulation — in ASRM's words, not developing and releasing an egg from the ovary on a regular basis.

Every timing strategy assumes an ovulation to aim at. The fertile window is six days ending at ovulation; ovulation kits detect the hormone surge just before it. If ovulation is not happening predictably, none of that machinery has anything to lock onto, and doing it more carefully will not change the outcome.

This is the one place on this site where we would say to skip ahead. Irregular or absent periods while trying to conceive is a reason to be seen rather than to keep optimising, and it does not require waiting out the twelve-month threshold.

What the diagnosis actually is

ASRM's criteria need two of three, not all three: chronic lack of ovulation; chronic high testosterone, which can show as acne or excess facial and midline hair growth; and ovaries with multiple small fluid-filled sacs, the antral follicles the old name refers to.

Two of three is worth knowing, because people rule themselves out on the strength of one feature they do not have. Notably, you do not need the ovaries to look polycystic on a scan to have it.

ASRM puts prevalence at five to ten percent of women, which makes it one of the more common reasons a cycle does not behave.

On the name: ASRM now endorses renaming this Polyendocrine Metabolic Ovarian Syndrome — PMOS — to better reflect the hormonal and metabolic picture rather than describing the ovaries alone. You will meet both names, and PCOS remains the one most people and most search results use.

The metabolic half

The renaming points at something real. ASRM notes metabolic syndrome is common alongside it, with symptoms including extra weight around the abdomen, high cholesterol, high blood pressure, and insulin resistance or diabetes.

That matters practically because insulin resistance is treatable, and treating it can improve ovulation rather than only addressing long-term health.

It also explains why the advice you get may be about things that sound unrelated to fertility. They are not unrelated — they are upstream of the ovulation problem.

What treatment looks like

The first line is oral. ASRM names clomiphene citrate as a medication taken by mouth to stimulate ovulation, and letrozole as another oral option.

If oral medicines do not work, injected fertility medicines called gonadotropins are the next step.

Metformin appears where insulin resistance is part of the picture, working by improving insulin sensitivity.

The point of listing these is not to plan your treatment but to make clear there is a path. Anovulation is one of the more addressable causes of not conceiving, and the goal of the first steps is simply to produce an ovulation for the rest to work around.

Common questions

Can I get pregnant with PCOS?: It is one of the more treatable reasons for difficulty conceiving, precisely because the obstacle is usually a missing ovulation rather than something structural. ASRM's list of ovulation-inducing treatments — clomiphene, letrozole, gonadotropins, metformin where insulin resistance is involved — exists because restoring ovulation is often achievable.
My cycles are irregular. Should we still wait a year before asking?: No. The twelve-month threshold assumes regular cycles with a predictable ovulation. Irregular or absent periods are a reason to be seen sooner, because the thing in the way is identifiable and treatable rather than a matter of persistence.
My ovaries looked normal on the scan. Does that rule it out?: No. Diagnosis requires two of three features — irregular ovulation, high testosterone, and polycystic-appearing ovaries — so it is entirely possible to have it without the scan finding. This is a common reason people rule themselves out incorrectly.
Why is it being called PMOS now?: ASRM endorses renaming it Polyendocrine Metabolic Ovarian Syndrome to better reflect the hormonal and metabolic aspects rather than naming it after how the ovaries look. Both names are in use; PCOS is still what most people and most searches use.

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Where this comes from

Polyendocrine Metabolic Ovarian Syndrome (PMOS), formerly PCOSASRM
A fertility specialist on PCOS, ovulation and what the renaming changedNatalie Crawford, MD

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