You can get pregnant with PCOS, now called PMOS. Many women conceive naturally; others need help with ovulation or another fertility factor. Irregular or absent periods can reduce the opportunities to conceive and make timing difficult, but the diagnosis alone does not mean permanent infertility.

When a cycle stretches over many weeks, it can be hard to know whether to keep trying, take another test or ask for treatment. Start with the question that would change your next step, rather than adding another month of uncertain tracking.

Quick answers about PCOS, PMOS and pregnancy

Can you get pregnant naturally with PCOS or PMOS?

Yes. Many women conceive without fertility treatment. Irregular ovulation can mean fewer opportunities, but your age, ovulation pattern, sperm health and other reproductive factors affect the outlook. PMOS does not automatically mean you will need IVF.

What should a fertility assessment for PCOS or PMOS check?

Your GP reviews your cycle, time trying, symptoms, medicines and relevant results, then selects tests to suit your history. Semen analysis is usually considered alongside your assessment when a male partner contributes sperm. Whether and when to check the fallopian tubes depends on your history and planned treatment.

When should you seek fertility advice with PMOS?

Speak with your GP early if periods are very irregular or absent, or you already have a fertility concern. For people without known concerns, Australian consumer guidance advises review after 12 months of trying at 35 or younger, or six months at 36 or older. These are not compulsory waiting periods.

Are PCOS and PMOS the same condition?

PMOS stands for polyendocrine metabolic ovarian syndrome. The name change was announced in May 2026 to better reflect the condition’s hormonal, metabolic and reproductive effects. It does not create a second diagnosis or invalidate research published under PCOS.

You may see both terms in referrals and health information. Our guide to the change from PCOS to PMOS explains the terminology; here, the focus is conception and pregnancy care.

How should you approach getting pregnant with irregular periods and PMOS?

With PMOS, ovulation may happen late, infrequently or not in a particular cycle. Fewer ovulations mean fewer opportunities across the same number of months. A longer cycle does not mean a longer fertile window.

The usual 12-month or six-month review points apply to regular unprotected sex without an identified concern. With PMOS-related cycle problems, discuss care sooner. Over 40, seek advice promptly rather than waiting.

What if you have had no period for about three months?

Take a pregnancy test when pregnancy is possible and arrange a GP review. In adults, repeatedly having cycles longer than 35 days or fewer than eight periods a year also warrants discussion.

Long gaps may require treatment to protect the uterine lining, separately from treatment to help conception. A medicine-induced withdrawal bleed does not prove ovulation has returned.

What can a PCOS or PMOS pregnancy success rate actually tell you?

There is no single PCOS pregnancy percentage that predicts your outcome. A study reporting ovulation, a positive pregnancy test or a live birth is measuring different results. A treatment success rate also cannot tell you your chance of conceiving naturally. Ask which outcome is being discussed and how closely the study population matches your situation.

How should ovulation tracking fit into PMOS fertility care?

Home tracking can help with timing, but it does not complete a fertility assessment. Decide with your clinician whether it would help answer a specific question while investigation or treatment is being planned.

A raised background LH level in some people with PMOS can cause misleading positive tests. Conversely, a negative result may reflect timing, urine concentration or a missed surge. The guide to tracking ovulation with PCOS or PMOS explains how to interpret a sequence rather than one result.

If mucus and LH results disagree, our explanation of fertile cervical mucus without confirmed ovulation addresses that specific uncertainty. Tracking is optional: if it is becoming expensive or distressing, discuss whether it is still helping.

If LH testing suits your plan, you can compare strip and midstream ovulation tests. Choose a format you can use correctly; switching formats does not remove the limitations associated with PMOS.

Why can a day-21 progesterone test be mistimed?

Progesterone testing is generally timed about one week before the next expected period, not automatically on day 21. Unpredictable cycles need clinician-directed timing. One result can support recent ovulation but cannot measure the quality of the whole luteal phase. The fertility hormone guide gives worked collection-date examples to discuss with your clinician.

How can you time sex without relying on day 14?

For natural conception, intercourse every two to three days can cover an uncertain fertile window without identifying one exact day.

During a monitored treatment cycle, use the clinic’s timing instructions instead. If too many follicles develop, the team may advise cancelling the cycle or avoiding unprotected sex to reduce multiple-pregnancy risk.

What should the first PMOS fertility assessment check?

Your GP starts with cycle dates, time trying, symptoms, previous pregnancies, medicines and existing results. Pregnancy exclusion and selected thyroid, prolactin or androgen tests may be relevant; not everyone needs the same hormone panel. Confirming the diagnosis and investigating a delay in conception are different tasks.

When a male partner contributes sperm, semen analysis is usually considered alongside your assessment, not only after several unsuccessful treatment cycles. Our male fertility assessment guide explains the process. Whether to check that the fallopian tubes are open, and when, depends on your history and planned treatment.

How does PMOS fertility treatment progress from GP assessment to monitored care?

Can a GP prescribe letrozole in Australia?

Your GP can begin the fertility assessment and arrange referral. Australian Prescriber recommends specialist referral when pharmacological treatment is needed for subfertility. Some GPs participate in shared care, so ask who will prescribe, arrange monitoring, review results and give the pregnancy-test date rather than assuming that a prescription alone is the complete treatment.

Before starting, establish who will review results and arrange monitoring, who will give the pregnancy-test date and who will advise on problems between appointments.

Agree when the plan will be reassessed instead of repeating unsuccessful cycles without review.

When is letrozole recommended for anovulatory PMOS infertility?

Letrozole is first-line for infertility associated with anovulatory PCOS or PMOS when no other infertility factor is present. Fertility use is off-label in Australia: it is outside the registered indication but supported by clinical guidance. Your prescriber should explain the evidence, risks and monitoring, and exclude pregnancy before treatment.

Cochrane found better pregnancy and live-birth outcomes with letrozole than with medicines such as clomiphene in the populations studied. It did not establish a clear difference in multiple-pregnancy rates. This supports a treatment choice, not a personal success percentage or a guarantee of one baby.

What roles do clomiphene, metformin and gonadotrophin injections have?

Clomiphene is another ovulation-induction option. Metformin may be used for metabolic health and, in selected cases, anovulatory infertility, although more effective ovulation-induction medicines are available. Injectable gonadotrophins may be considered if oral treatment is unsuitable or unsuccessful. The choice depends on the problem being treated, response and monitoring, not a fixed ladder everyone must complete.

Where does IUI fit, and how is it different from ovulation induction?

Intrauterine insemination, or IUI, places a partner’s or donor’s sperm into the uterus around ovulation. It may be used with a natural cycle or ovulation-stimulating medicines. Ovulation induction helps an egg develop and be released; IUI changes how sperm reaches the uterus. They are different procedures and are sometimes combined. IUI is not a compulsory step before IVF for everyone with PMOS.

When should you reconsider the plan or discuss IVF?

If treatment does not produce ovulation, the response needs review. If ovulation occurs without pregnancy, revisit the broader assessment. IVF may be appropriate after first- or second-line ovulation-induction treatment fails, or earlier if another indication changes the pathway. There is no universal requirement to complete six to nine ovulatory cycles first.

PMOS can increase the risk of an excessive ovarian response during IVF, including ovarian hyperstimulation syndrome, or OHSS. Ask how the clinic will reduce and monitor that risk. Our guide to choosing a fertility specialist or IVF clinic covers questions about communication, monitoring and treatment decisions.

Request an itemised estimate for medicines, monitoring and procedures, including charges if a cycle is cancelled. Medicare can help with eligible treatment costs, but a rebate is not full coverage. Check the expected gap with the clinic and insurer before committing.

How should you prepare for pregnancy with PMOS?

PMOS-related preconception care includes blood pressure and glucose assessment. The international guideline recommends offering an oral glucose tolerance test, or OGTT, when planning pregnancy or seeking fertility treatment. It checks glucose handling, not ovulation. The guide to PMOS and insulin resistance explains this metabolic aspect of care.

Healthy eating and physical activity can benefit health without weight loss, and no single diet is best for every PMOS outcome. Agree achievable goals that suit your eating history, culture and budget. Weight management, when relevant, should sit alongside age-sensitive fertility assessment rather than indefinitely replacing it. Our PCOS and PMOS food list and meal plan gives practical options.

Most people are advised to take 400 micrograms of folic acid daily, ideally starting 12 weeks before trying and continuing through the first 12 weeks of pregnancy. Some need a higher clinician-directed dose. Review your current supplement before adding another product.

The Australian iodine recommendation is 150 micrograms daily when planning pregnancy, pregnant or breastfeeding. Seek individual advice first if you have a thyroid condition. These supplements support pregnancy preparation; they do not treat absent ovulation.

Review prescription medicines, pharmacy products and supplements before trying, particularly treatments for androgen-related symptoms or weight management. Do not stop prescribed treatment without advice. Ask for help with smoking, vaping or alcohol, and discuss any anxiety, low mood or pressure around intercourse. Support does not need to wait until fertility treatment fails.

Can inositol replace fertility treatment for PMOS?

The international guideline considers inositol experimental as a fertility therapy because benefits and risks remain uncertain. Our inositol dosing and safety guide explains the evidence and supplement-label questions to discuss with your clinician. Do not let a supplement delay assessment.

When should you take a pregnancy test with irregular cycles and PMOS?

Pregnancy tests detect human chorionic gonadotropin, or hCG, rather than LH. PMOS does not stop a test detecting hCG, but late ovulation can make testing earlier than you realise. Follow your device’s directions and read it only within the stated window.

Most home pregnancy tests can detect hCG on the day your period is due. With irregular cycles, that date may be difficult to identify, so follow the timing instructions for the exact test you are using and remember that an early negative can be inconclusive. Pregnancy, Birth and Baby advises repeating a negative test after a few days when the period still has not arrived. During fertility treatment, follow your clinic’s planned test date rather than general home-testing advice.

If a fresh test is needed, you can compare home pregnancy-test formats. Repeated negatives with an absent period need review, as explained in our guide to no period but a negative pregnancy test.

Australian Ovidrel information warns that this hCG trigger can cause misleading positive urine or blood results for up to ten days after administration. Do not change fertility medicines based on an early home result.

What should you do after a positive pregnancy test with PMOS?

Contact your GP, midwife or fertility clinic and mention PMOS, treatment medicines and uncertain dates. Our guide to what to do after a positive pregnancy test covers the first steps. Home-test line darkness cannot establish pregnancy location or confirm healthy development.

PMOS is associated with higher risks of gestational diabetes, high blood pressure, pre-eclampsia and miscarriage. These are reasons to plan screening and monitoring, not predictions that a complication will occur.

What glucose testing may be needed early in a PMOS pregnancy?

Tell the maternity team whether glucose testing was completed before pregnancy. The PMOS guideline recommends early testing if it was missed. Newer Australasian diabetes guidance uses risk-based HbA1c testing at the first visit and an early OGTT in selected situations, such as previous gestational diabetes.

Where an early OGTT is indicated, ADIPS recommends it before 20 weeks, ideally at 10–14 weeks, rather than before ten weeks. Ask which test you need and when; do not assume “early screening” always means an immediate OGTT. Unless diabetes has already been diagnosed, the routine OGTT at 24–28 weeks is still recommended even after normal early results.

When should miscarriage or warning symptoms be assessed?

You do not need to wait for a third miscarriage before discussing assessment. RANZCOG defines recurrent miscarriage as two or more confirmed intrauterine pregnancy losses up to 20 weeks, not necessarily consecutive. Support is appropriate after any loss.

Contact your care team about bleeding or concerning pain. If pregnancy is possible and you have strong or one-sided abdominal pain, shoulder-tip pain, heavy bleeding or marked dizziness, seek urgent assessment at an emergency department. Call 000 for collapse, severe pain, very heavy bleeding or severe illness. Do not delay because a home test was negative or your estimated dates seem early.

What follow-up is useful after birth with PMOS?

PMOS does not determine how breastfeeding will go. Some women produce enough milk; others need additional help. Discuss concerns with your midwife or a lactation consultant and seek support early when feeding or supply is difficult.

Breastfeeding can delay periods, but ovulation may return before the first period. Discuss contraception before resuming sex if you are not planning another pregnancy. Previous difficulty conceiving is not reliable contraception.

If you had gestational diabetes, arrange the recommended follow-up OGTT six to twelve weeks after pregnancy, or as soon as possible if that window was missed. Ongoing glucose checks are still important even when the first result is normal.

Frequently asked questions about PMOS fertility and pregnancy in Australia

Do polycystic ovaries on a scan mean I need fertility treatment?

No. Polycystic ovarian appearance alone does not diagnose PMOS or establish a need for fertility treatment. Your clinician considers ovulation, androgen-related findings, other possible explanations and whether there is a fertility problem to address.

Do I need ovulation medicine if my periods are regular?

Not automatically. Regular periods can be reassuring, although they do not guarantee ovulation in every cycle or exclude another fertility factor. If pregnancy is delayed, assessment should identify what needs treatment rather than assume letrozole is necessary because you have PMOS.

Does high AMH mean good egg quality or a high pregnancy chance?

No. Anti-Müllerian hormone, or AMH, helps assess ovarian reserve and predict the response to fertility stimulation. It does not measure egg quality or guarantee natural conception. Our guide to AMH levels and fertility explains why age and the wider assessment remain important.

Should I keep taking metformin after a positive pregnancy test?

Ask the clinician who prescribed it before changing treatment. The decision depends on why you take metformin and your pregnancy plan. In PMOS, it has not been shown to prevent gestational diabetes or late miscarriage, so it should not be treated as routine protection against those complications.

Do I have to stop breastfeeding before trying for another baby?

Not necessarily. Some people ovulate and conceive while breastfeeding. If periods have not returned, conception is difficult or fertility medicines are being considered, discuss an individual plan with your clinician. Whether to change feeding or treatment depends on your circumstances, not the PMOS label alone.

Will pregnancy cure PCOS or PMOS?

No. Pregnancy is not a cure for PMOS. Symptoms and cycles can change across life stages, but metabolic health and other ongoing concerns may still need care. Keep a follow-up plan with your GP after birth, even if pregnancy occurred without treatment.

Next Steps in Australia

At your next appointment, name the question you need answered: whether ovulation is occurring, whether another fertility factor needs checking, or which pregnancy-care checks are due. Bring existing dates and results, but do not postpone the appointment to create a perfect record.

Leave with an agreed next action, the person responsible for arranging it and a review date. Our guide to seeing a fertility specialist in Australia explains the referral step. A useful plan tells you what happens next whether the test is positive, negative or still unclear.

Last reviewed: 9 September 2026
Next scheduled review: September 2027

References

Fertility2Family articles are researched using Australian Government health guidance, professional clinical recommendations and peer-reviewed medical literature. The references below were used to research and medically review this article and provide additional reading for readers who want to explore the evidence in more detail.

Monash University Polyendocrine Metabolic Ovarian Syndrome: New name to improve diagnosis and care of condition affecting 170 million women worldwide
Explains the May 2026 change from PCOS to PMOS and why the new name reflects hormonal, metabolic and reproductive effects beyond the ovaries.

Australian Prescriber Pharmacological management of polycystic ovary syndrome
Australian clinical review covering diagnosis, individualised medicine choices, psychological wellbeing, metabolic health and specialist referral when medicines are needed to treat subfertility.

Healthdirect Australia Planning for your pregnancy
Australian preconception guidance on review timing, medicines, folic acid, vaccination history and health conditions that may require individual advice before trying to conceive.

American Society for Reproductive Medicine Fertility evaluation of infertile women: a committee opinion (2021)
Professional guidance on timely fertility assessment, partner testing, progesterone sampling, urinary LH limitations and why ovarian reserve results cannot independently predict natural conception.

American Society for Reproductive Medicine Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polyendocrine Metabolic Ovarian Syndrome
Australian-led international recommendations covering irregular cycles, endometrial protection, glucose assessment, fertility treatments, inositol uncertainty and pregnancy-related risks in women with PCOS or PMOS.

Healthdirect Australia Fertility awareness (natural family planning)
Explains cervical mucus, temperature and calendar tracking, the fertile window and circumstances such as illness or irregular cycles that can complicate interpretation.

The Medical Journal of Australia Summary of the 2023 international evidence‐based guideline for the assessment and management of polycystic ovary syndrome: an Australian perspective
Australian interpretation of international recommendations on off-label ovulation induction, letrozole, treatment escalation, preconception health and collaboration between general practitioners and fertility specialists.

Cochrane Database of Systematic Reviews Aromatase inhibitors (letrozole) for ovulation induction in infertile women with polycystic ovary syndrome
Systematic review comparing letrozole with other ovulation-induction medicines, assessing live birth, pregnancy, miscarriage and multiple-pregnancy outcomes in women with anovulatory PCOS.

Victorian Assisted Reproductive Treatment Authority Fertility treatment explained
Explains ovulation induction, intrauterine insemination and IVF, their different purposes, treatment monitoring and questions to discuss when weighing benefits, risks and costs.

Services Australia Medicare services for conceiving, pregnancy and birth
Explains Medicare assistance for fertility and pregnancy care, potential out-of-pocket costs and the importance of checking charges with the clinic and insurer before treatment.

National Health and Medical Research Council Iodine supplementation for Pregnant and Breastfeeding Women
Current Australian recommendation for 150 micrograms of iodine daily when planning pregnancy, pregnant or breastfeeding, with prior medical advice for people with thyroid conditions.

Healthdirect Australia Human chorionic gonadotropin (hCG) test
Describes urine and blood pregnancy tests, early false negatives, urine dilution, following device instructions and repeating a negative result when the period has not arrived.

Australian Commission on Safety and Quality in Health Care Ovidrel Pen
Australian medicine information on hCG-trigger treatment, monitoring precautions and possible interference with blood or urine pregnancy testing for up to ten days after administration.

The Medical Journal of Australia Australasian Diabetes in Pregnancy Society (ADIPS) 2025 consensus recommendations for the screening, diagnosis and classification of gestational diabetes
Current Australasian recommendations on risk-based early diabetes screening, selected early oral glucose tolerance testing and routine testing at 24–28 weeks unless diabetes is already diagnosed.

Royal Australian and New Zealand College of Obstetricians and Gynaecologists Miscarriage, Recurrent Miscarriage and Ectopic Pregnancy (C-Gyn 38)
Australian and New Zealand guidance defining recurrent miscarriage and outlining pregnancy-loss assessment, early-pregnancy investigation, appropriate follow-up and support after miscarriage or ectopic pregnancy.

Healthdirect Australia Ectopic pregnancy
Australian guidance on abdominal pain, shoulder-tip pain, bleeding and faintness in possible ectopic pregnancy, including urgent assessment and emergency assistance for severe symptoms.

Australian Breastfeeding Association Polyendocrine metabolic ovarian syndrome (PMOS or PCOS) and breastfeeding
Explains that milk supply varies among women with PMOS and describes practical preparation, early feeding support and assistance when breastfeeding or milk supply is difficult.

Australian Breastfeeding Association Breastfeeding, fertility and assisted reproduction
Describes breastfeeding-related changes in periods and ovulation, fertility returning before menstruation and circumstances where individual advice about another pregnancy or fertility treatment is useful.

National Diabetes Services Scheme Health Checks After Pregnancy
Outlines follow-up after gestational diabetes, including an oral glucose tolerance test six to twelve weeks after pregnancy and ongoing diabetes checks based on individual risk.

Healthdirect Australia Infertility
Australian consumer information on fertility factors, initial assessment, treatment options and seeking earlier medical advice when an existing concern could make conception more difficult.

Pregnancy, Birth and Baby Pregnancy tests
Australian guidance on home pregnancy-test timing, testing when a period is due, first-morning urine, early false-negative results and repeating testing when a period still has not arrived.