If your periods have gone walkabout and you're trying to conceive, start with a GP, not a shopping basket. PCOS β the NHS page now also calls it PMOS, polyendocrine metabolic ovarian syndrome β is one of the common reasons ovulation goes irregular. Same ovaries, same insulin-and-androgen story, new label. There isn't a cure on that page. Lifestyle changes and medicines a clinician can actually prescribe can help. Lifestyle changes and medicines a clinician can prescribe can help.
Clomifene, metformin and ovarian drilling sit with a doctor. Inositol, vitamin D and a βPCOS dietβ sit around that pathway.
What PCOS actually does to fertility
In plain English: the ovaries may not release an egg each month. Symptoms can include irregular or widely spaced periods, extra hair or hair loss, weight that's hard to shift, acne, tiredness and mood changes. Diagnosis is bloods and a scan, done by a GP and, if needed, a gynaecologist or endocrinologist. It is not a TikTok score.
What you can do, according to that same NHS page: a balanced diet, regular exercise β with a warning to skip high-intensity sessions if they make symptoms worse β and trying to lose weight if you are overweight. That is the clinical bar. Everything else on a supplement label is optional and commercial,
Diet: the bit with the most honest evidence
Pattern beats miracle foods. A Mediterranean-style plate β vegetables, whole grains, legumes, olive oil, some fish, not much ultra-processed snack food β is what researchers keep coming back to for general reproductive health. Harvard Health on fertility and diet is a readable overlay, not a PCOS protocol.
Practical and a bit boring, which is usually the point:
- Build meals around protein and fibre so blood sugar is less of a rollercoaster. That's insulin-adjacent common sense, not a prescription.
- Keep ultra-processed sweet drinks as an occasional thing, not a daily habit.
- Don't crash-diet. Starvation is not a fertility strategy.
- If you already eat oily fish twice a week, you are doing more for vitamin D and omega-3 than another capsule will pretend to.
Complementary therapies have not been properly evaluated for fertility problems. Inositol is a nutrient people buy. It is not a NICE fertility treatment.
Vitamin D: the public-health number, not a PCOS megadose
Most UK adults should consider 10 Β΅g (400 IU) a day in autumn and winter, and year-round if you get little sun or have darker skin. That's on the NHS vitamin D page. The same 10 Β΅g figure is what pregnancy nutrition guidance uses. Nobody wrote a PCOS megadose into it.
Don't take more than 100 Β΅g (4,000 IU) a day from supplements unless a clinician told you to. A forum βI take 5,000 IU for my PCOSβ is not a protocol.
Inositol: papers people quote, not an NHS treatment
Myo-inositol and D-chiro-inositol show up in PCOS papers and in tubs marketed at ovulation. Many preconception all-in-ones still do not include gram-doses of myo-inositol. If a specialist has you on a specific gram-dose, that is their clinic, not a multiβs facts panel.
Interesting nutrients are not a live-birth protocol. Don't let a 4,000 mg inositol powder become the thing you do instead of seeing a GP about absent periods.
| Topic | What UK pages actually say | What it is not |
|---|---|---|
| PCOS / PMOS fertility | Ovaries may not release an egg each month; GP first; medicines such as clomifene sit with clinicians | A supplement protocol |
| Diet and movement | Balanced diet, regular exercise, avoid high-intensity if it worsens symptoms; lose weight if overweight | A keto prescription from a shop |
| Vitamin D | 10 Β΅g (400 IU) in the seasons they specify; do not exceed 100 Β΅g/day from supplements | A high-dose PCOS cure |
| Inositol | Not on the NHS treatment list; complementary fertility therapies are not properly evaluated | An NHS-listed treatment |
Where a fertility formula fits β and where it doesn't
If you're TTC with a PCOS diagnosis, the 90-day preconception window still exists for follicle maturation. A food supplement can sit beside GP care. It cannot restart ovulation. Sperm still has a ~74-day production cycle even when the diagnosis is on her chart.
If periods are absent, you've been trying for a year (or you're 36+), or a clinician has already named anovulation, skip the forum stack and book the appointment. See how long to try before seeing a GP for the UK clocks.
FAQ
Does the NHS still call it PCOS?
The live page uses PMOS and says it used to be called PCOS. Clinics, labs and most UK search queries still say PCOS. If your letter says one and Google says the other, you are not in two diseases.
Should I take inositol from a fertility brand?
Only if someone qualified asked you to, and only as a food supplement. Don't stop prescribed clomifene or metformin to βswitch to natural inositolβ.
Clinic first. Then food. Then, if you still want a preconception formula beside that, read the inositol row on the label β many stacks do not include it.
How Her Fertility fits
PCOS care is dietetic and medical β and often inositol in grams if a clinician asked. Her Fertility is a preconception multi: CoQ10 300 mg, NAC 400 mg, 5-MTHF 400 Β΅g, zinc 20 mg and selenium 200 Β΅g. NAC 400 mg is not a 600β1,200 mg PCOS literature protocol, and this formula is not a gram-dose inositol product. Use it as TTC nutrition beside prescribed care.
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