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Published on: 7/14/2026

Why might a woman with PCOS experience irregular periods after giving birth?

After giving birth, a woman with PCOS might have irregular periods due to changes in hormone levels and the effects of breastfeeding on ovulation.

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Explanation

After giving birth, a woman's body goes through many changes that can affect her menstrual cycle. For women with PCOS, these changes can lead to irregular periods.

Hormonal Changes:

  • According to research, the body undergoes hormonal shifts after childbirth. These changes can affect the regularity of the menstrual cycle, making periods irregular.

Breastfeeding Effects:

  • Breastfeeding can also impact ovulation and fertility. When a woman is breastfeeding, her body produces hormones that can delay the return of regular menstrual cycles. This is because breastfeeding naturally suppresses ovulation.

These factors combined can contribute to why a woman with PCOS might experience irregular periods after having a baby. It is important to remember that each woman's experience can be different, and the return to regular cycles may vary. If you're concerned about your symptoms or menstrual irregularities, you can use Ubie's free AI symptom checker to better understand what might be causing your concerns.

(References)

  • Hatherley LI. (1985). Natural family planning after pregnancy. A problem for .... Clinical reproduction and fertility, 4084891.

  • McNeilly AS, Howie PW, Houston MJ, Cook A, & Boyle H. (1982). adequacy of post-partum luteal phases. Clinical endocrinology, 7165971.

  • Chao S. (1987). The effect of lactation on ovulation and fertility. Clinics in perinatology, 3549114.

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