How to regulate periods naturally?

Note on the name: in May 2026, polycystic ovary syndrome (PCOS) was formally renamed polyendocrine metabolic ovarian syndrome (PMOS), following a global consensus process. The old name was inaccurate — the condition affects multiple hormone and metabolic systems, not just the ovaries, and "polycystic" wrongly implies ovarian cysts. Nothing about the condition, its diagnosis or its treatment has changed. Both names will be used side by side for the next few years, and we use PCOS below since that is the term most people know.

Lifestyle measures genuinely help, particularly where irregular cycles are driven by weight, insulin resistance or stress. What has the best evidence behind it: if you are overweight and have PCOS, losing around 5–10% of your body weight can restore ovulation and regular cycles on its own, without medication. That is a smaller change than most people expect — for someone at 80 kg, roughly 4–8 kg. Also worth doing: regular moderate exercise, reducing refined carbohydrates and sugar, protecting your sleep, and addressing chronic stress where you can. Correcting vitamin D deficiency is sensible if you are deficient, though it is not a treatment for irregular periods in itself. What these measures will not fix: irregular cycles caused by thyroid disease, raised prolactin, premature ovarian insufficiency, or a structural problem in the uterus. Those need diagnosis and specific treatment, and time spent on lifestyle alone delays that. So the practical advice is to do both. Start the lifestyle changes now, but if your periods have been irregular for more than three months, book a gynaecology review alongside rather than waiting to see if lifestyle works first.