A late period now and then is normal. A pattern of lateness is a message.
Irregular periods are common, and most of the time there is a reason worth finding. PMOS — the condition known as PCOS/PCOD — is one of the leading causes in Indian women, but not the only one. The useful skill is knowing what counts as irregular, and when irregularity points to PMOS rather than something else.
What counts as "irregular"?
A typical cycle runs about 21 to 35 days. Periods are usually considered irregular if:
- Cycles are shorter than ~21 days or longer than ~35 days
- The gap changes a lot from month to month
- You miss periods for several months
- Bleeding is very heavy, very light, or unpredictable
An occasional off month is normal, especially with travel, illness, or stress. A repeating pattern is what deserves a look.
When it points to PMOS
Irregular periods point towards PMOS when they come together with other signs:
- Acne, especially along the jaw
- Weight gain, or difficulty losing weight
- Extra hair on the face or body
- Hair thinning on the scalp
It is the combination that matters. Irregular periods plus these signs make PMOS likely; irregular periods alone could be many things. See the full picture in PMOS symptoms, and why we call it PMOS.
When it's probably something else
Irregular periods can also come from:
- Thyroid problems (see thyroid symptoms in women)
- High stress or poor sleep
- Sudden weight loss or gain, or heavy exercise
- Certain medicines
- The natural years near puberty and menopause
This is why a doctor does not assume PMOS from a single irregular stretch — the same symptom has several possible roots.
What a doctor does
A doctor reviews your cycle history and other signs, then checks hormones, blood sugar, and thyroid, and sometimes an ultrasound. The aim is to find which cause is yours, because the care is different for each.
An irregular cycle is your body keeping notes. It is worth reading them before they pile up.
Talk to a doctor
Periods that won't settle into a rhythm? An NMC-registered doctor on Kyros can find the reason and guide the right tests. Take the assessment.
References
- Ganie MA, et al. Prevalence and clinical features of PCOS in India (ICMR national study). JAMA Network Open, 2024.
Medically reviewed by [doctor name, NMC reg. no.] on [date]. For general information only; not a substitute for your own doctor. PCOS/PCOD remain the medically recognised terms.