Can polycystic ovary syndrome cause a missed period?

Polycystic ovary syndrome can affect the hormone signals that coordinate ovulation. When ovulation does not happen regularly, the uterine lining may not shed on a predictable schedule. This can appear as a late period, a skipped period, or a longer gap between bleeds. A missed period alone does not establish PCOS; pregnancy, changes in weight or exercise, stress, thyroid problems, breastfeeding, and other hormonal causes can also alter cycles.

If pregnancy is possible, take a pregnancy test according to the product instructions. Record the first day of each bleed, gaps between periods, acne, increased facial or body hair, and any change in weight. Arrange a medical assessment if missed periods recur or your cycle pattern has changed. A clinician may review your history, medicines, symptoms, and pregnancy possibility before deciding whether examinations or blood tests are useful.

Seek urgent care for severe or one-sided lower abdominal pain, fainting, marked dizziness, or heavy bleeding, especially if pregnancy is possible. Contact a clinician promptly if a missed period occurs with new severe headaches, vision changes, or milky nipple discharge. Even without these warning signs, ongoing absent or irregular periods deserve assessment so the cause and appropriate cycle management can be discussed.

Ask whether your cycle pattern fits PCOS, whether pregnancy or another hormone condition should be checked, and what symptoms to track. You can also ask how irregular bleeding may affect fertility planning, whether treatment is needed to protect the uterine lining, and when to return if periods remain absent.