Published on: 6/12/2025
Why might someone with PCOS experience irregular periods on birth control after years of regularity?
Irregular periods in someone with PCOS on birth control might happen due to changes in the body or the effects of the birth control itself.
Explanation
Birth control pills are often used to help manage irregular periods in people with Polycystic Ovary Syndrome (PCOS). However, after some time, the body may react differently to the hormones in the pills.
Possible Reasons for Irregular Periods:
- Hormonal Fluctuations: Over time, the body's hormone levels might change, affecting how the birth control works.
- Endometrial Changes: According to Willette and Cazes, changes in the lining of the uterus might cause irregular bleeding.
- Natural Variability: As noted by Kulshreshtha and colleagues, even after stopping birth control, menstrual cycles can vary in people with PCOS.
It's important for individuals experiencing these changes to consult with a healthcare provider to explore their specific situation and consider if a different type of birth control might be more effective.
(References)
- Schrager S. (2002). Abnormal uterine bleeding associated with hormonal .... American family physician, 12046776.
- Willette A, & Cazes E. (2024). Endometrial Proliferation and Heavy Menstrual Bleeding .... Cureus, 39544620.
- Kulshreshtha B, Arora A, Pahuja I, Sharma N, & Pant S. (2016). Menstrual cyclicity post OC withdrawal in PCOS. Journal of obstetrics and gynaecology : the journal of the Institute of Obstetrics and Gynaecology, 26982394.
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